<PAGE> PAGE 1
000 A000000 08/31/96
000 C000000 0000843781
000 D000000 N
000 E000000 NF
000 F000000 Y
000 G000000 N
000 H000000 N
000 I000000 3.0
000 J000000 U
001 A000000 DREYFUS TREASURY PRIME CASH MANAGEMENT
001 B000000 811-5718
001 C000000 2129226754
002 A000000 200 PARK AVENUE
002 B000000 NEW YORK
002 C000000 NY
002 D010000 10166
002 D020000 0144
003 000000 N
004 000000 N
005 000000 N
006 000000 N
007 A000000 N
007 B000000 0
015 A000001 THE BANK OF NEW YORK
015 B000001 C
015 C010001 NEW YORK
015 C020001 NY
015 C030001 10286
015 E010001 X
018 000000 Y
019 A000000 Y
019 B000000 157
019 C000000 DREYFUSFAM
022 A000001 PARIBAS CORP.
022 B000001 13-3235334
022 C000001 2510953
022 D000001 1168579
022 A000002 BARCLAYS DE ZOETE WEDD SECURITIES, INC.
022 B000002 13-3551367
022 C000002 1590176
022 D000002 1285401
022 A000003 UBS SECURITIES INC.
022 B000003 13-2932996
022 C000003 882231
022 D000003 526431
022 A000004 SMITH BARNEY INC.
022 B000004 13-1912900
022 C000004 671151
022 D000004 249311
022 A000005 DILLON, READ & CO. INC.
022 B000005 13-1939216
<PAGE> PAGE 2
022 C000005 428961
022 D000005 99086
022 A000006 GOLDMAN, SACHS & CO.
022 B000006 13-5108880
022 C000006 106807
022 D000006 291392
022 A000007 BA SECURITIES, INC.
022 B000007 95-4035346
022 C000007 200731
022 D000007 0
022 A000008 BANK OF AMERICA NT & SA
022 B000008 94-1687665
022 C000008 150247
022 D000008 0
022 A000009 SANWA SECURITIES (USA) CO., L.P.
022 B000009 13-3046258
022 C000009 127889
022 D000009 0
022 A000010 SBC CAPITAL MARKETS, INC.
022 B000010 13-3498485
022 C000010 126448
022 D000010 0
023 C000000 7551357
023 D000000 3679639
026 A000000 Y
026 B000000 N
026 C000000 N
026 D000000 Y
026 E000000 N
026 F000000 N
026 G010000 N
026 G020000 N
026 H000000 Y
028 A010000 5336763
028 A020000 4326
028 A030000 0
028 A040000 5462466
028 B010000 4791325
028 B020000 4111
028 B030000 0
028 B040000 4889343
028 C010000 4774878
028 C020000 4104
028 C030000 0
028 C040000 4802959
028 D010000 4797791
028 D020000 4194
028 D030000 0
028 D040000 4560024
028 E010000 5489042
028 E020000 4853
<PAGE> PAGE 3
028 E030000 0
028 E040000 5300566
028 F010000 5196073
028 F020000 5018
028 F030000 0
028 F040000 5144418
028 G010000 30385872
028 G020000 26606
028 G030000 0
028 G040000 30159776
028 H000000 0
037 000000 N
038 000000 0
040 000000 Y
041 000000 Y
042 A000000 1
042 B000000 0
042 C000000 99
042 D000000 0
042 E000000 0
042 F000000 0
042 G000000 0
042 H000000 0
043 000000 360
044 000000 0
055 A000000 Y
055 B000000 N
056 000000 N
057 000000 N
062 A000000 Y
062 B000000 104.5
062 C000000 0.0
062 D000000 0.0
062 E000000 0.0
062 F000000 0.0
062 G000000 0.0
062 H000000 0.0
062 I000000 0.0
062 J000000 0.0
062 K000000 0.0
062 L000000 0.0
062 M000000 0.0
062 N000000 0.0
062 O000000 0.0
062 P000000 0.0
062 Q000000 0.0
062 R000000 0.0
063 A000000 81
063 B000000 0.0
064 A000000 N
064 B000000 N
<PAGE> PAGE 4
071 A000000 0
071 B000000 0
071 C000000 0
071 D000000 0
072 A000000 6
072 B000000 86876
072 C000000 0
072 D000000 0
072 E000000 0
072 F000000 3322
072 G000000 0
072 H000000 0
072 I000000 0
072 J000000 0
072 K000000 0
072 L000000 0
072 M000000 0
072 N000000 0
072 O000000 0
072 P000000 0
072 Q000000 0
072 R000000 0
072 S000000 0
072 T000000 360
072 U000000 0
072 V000000 0
072 W000000 0
072 X000000 3682
072 Y000000 0
072 Z000000 83194
072AA000000 197
072BB000000 286
072CC010000 0
072CC020000 0
072DD010000 76304
072DD020000 6890
072EE000000 0
073 A010000 0.0253
073 A020000 0.0241
073 B000000 0.0000
073 C000000 0.0000
074 A000000 0
074 B000000 0
074 C000000 3564967
074 D000000 0
074 E000000 0
074 F000000 0
074 G000000 0
074 H000000 0
074 I000000 0
074 J000000 574394
<PAGE> PAGE 5
074 K000000 0
074 L000000 20538
074 M000000 0
074 N000000 4159899
074 O000000 574519
074 P000000 602
074 Q000000 0
074 R010000 0
074 R020000 0
074 R030000 0
074 R040000 172427
074 S000000 0
074 T000000 3412351
074 U010000 3037265
074 U020000 375299
074 V010000 1.00
074 V020000 1.00
074 W000000 0.9996
074 X000000 1635
074 Y000000 0
075 A000000 3009263
075 B000000 0
076 000000 0.00
077 A000000 N
SIGNATURE JOSEPH F. TOWER
TITLE ASSISTANT TREASURER
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000843781
<NAME> DREYFUS TREASURY PRIME CASH MANAGEMENT
<SERIES>
<NUMBER> 2
<NAME> CLASS B
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> FEB-28-1997
<PERIOD-END> AUG-31-1996
<INVESTMENTS-AT-COST> 3564967
<INVESTMENTS-AT-VALUE> 3564967
<RECEIVABLES> 594932
<ASSETS-OTHER> 0
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 4159899
<PAYABLE-FOR-SECURITIES> 574519
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 173029
<TOTAL-LIABILITIES> 747548
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 3412564
<SHARES-COMMON-STOCK> 375299
<SHARES-COMMON-PRIOR> 255621
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (212)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 0
<NET-ASSETS> 375292
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 86876
<OTHER-INCOME> 0
<EXPENSES-NET> 3682
<NET-INVESTMENT-INCOME> 83194
<REALIZED-GAINS-CURRENT> (89)
<APPREC-INCREASE-CURRENT> 0
<NET-CHANGE-FROM-OPS> 83105
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (6890)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 771801
<NUMBER-OF-SHARES-REDEEMED> (654850)
<SHARES-REINVESTED> 2727
<NET-CHANGE-IN-ASSETS> 252612
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> (123)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 3322
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 3682
<AVERAGE-NET-ASSETS> 285861
<PER-SHARE-NAV-BEGIN> 1.00
<PER-SHARE-NII> .024
<PER-SHARE-GAIN-APPREC> 0
<PER-SHARE-DIVIDEND> (.024)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 1.00
<EXPENSE-RATIO> .005
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000843781
<NAME> DREYFUS TREASURY PRIME CASH MANAGEMENT
<SERIES>
<NUMBER> 1
<NAME> CLASS A
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> FEB-28-1997
<PERIOD-END> AUG-31-1996
<INVESTMENTS-AT-COST> 3564967
<INVESTMENTS-AT-VALUE> 3564967
<RECEIVABLES> 594932
<ASSETS-OTHER> 0
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 4159899
<PAYABLE-FOR-SECURITIES> 574519
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 173029
<TOTAL-LIABILITIES> 747548
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 3412564
<SHARES-COMMON-STOCK> 3037265
<SHARES-COMMON-PRIOR> 2904241
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (212)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 0
<NET-ASSETS> 3037059
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 86876
<OTHER-INCOME> 0
<EXPENSES-NET> 3682
<NET-INVESTMENT-INCOME> 83194
<REALIZED-GAINS-CURRENT> (89)
<APPREC-INCREASE-CURRENT> 0
<NET-CHANGE-FROM-OPS> 83105
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (76304)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 29614070
<NUMBER-OF-SHARES-REDEEMED> (29504926)
<SHARES-REINVESTED> 23879
<NET-CHANGE-IN-ASSETS> 252612
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> (123)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 3322
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 3682
<AVERAGE-NET-ASSETS> 3009263
<PER-SHARE-NAV-BEGIN> 1.00
<PER-SHARE-NII> .025
<PER-SHARE-GAIN-APPREC> 0
<PER-SHARE-DIVIDEND> (.025)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 1.00
<EXPENSE-RATIO> .002
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>