<PAGE> PAGE 1
000 A000000 08/31/94
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 144 GLENN CURTISS BOULEVARD
002 B000000 UNIONDALE
002 C000000 NY
002 D010000 11556
002 D020000 0144
003 000000 N
004 000000 N
005 000000 N
006 000000 N
007 A000000 N
007 B000000 0
013 A000001 ERNST & YOUNG LLP
013 B010001 NEW YORK
013 B020001 NY
013 B030001 10019
018 000000 Y
019 A000000 Y
019 B000000 121
019 C000000 DREYFUSFAM
020 C000001 0
020 C000002 0
020 C000003 0
020 C000004 0
020 C000005 0
020 C000006 0
020 C000007 0
020 C000008 0
020 C000009 0
020 C000010 0
021 000000 0
022 A000001 BARCLAYS DE ZOETE WEDD SECURITIES, INC.
022 B000001 13-3551367
022 C000001 2449087
022 D000001 2558305
022 A000002 UBS SECURITIES INC.
022 B000002 13-2932996
022 C000002 938722
022 D000002 1295853
022 A000003 EASTBRIDGE CAPITAL INC.
<PAGE> PAGE 2
022 B000003 13-3501117
022 C000003 929346
022 D000003 39933
022 A000004 DILLON, READ & CO. INC.
022 B000004 13-1939216
022 C000004 375487
022 D000004 125185
022 A000005 KIDDER, PEABODY & CO. INCORPORATED
022 B000005 13-5650440
022 C000005 448960
022 D000005 11000
022 A000006 GOLDMAN, SACHS & CO.
022 B000006 13-5108880
022 C000006 128994
022 D000006 242207
022 A000007 NATIONS BANC CAPITAL MARKETS INC.
022 B000007 56-1684171
022 C000007 312501
022 D000007 0
022 A000008 SMITH BARNEY INC.
022 B000008 13-1912900
022 C000008 149515
022 D000008 64137
022 A000009 HSBC SECURITIES, INC.
022 B000009 13-2650272
022 C000009 172335
022 D000009 0
022 A000010 AUBREY G. LANSTON & CO. INC.
022 B000010 13-5552129
022 C000010 153777
022 D000010 0
023 C000000 6584941
023 D000000 4378916
028 A010000 2262703
028 A020000 3968
028 A030000 0
028 A040000 2463601
028 B010000 1840045
028 B020000 3774
028 B030000 0
028 B040000 2076067
028 C010000 1870083
028 C020000 3840
028 C030000 0
028 C040000 1989911
028 D010000 1883774
028 D020000 4171
028 D030000 0
028 D040000 2017483
028 E010000 1449181
028 E020000 3619
<PAGE> PAGE 3
028 E030000 0
028 E040000 1700902
028 F010000 1935119
028 F020000 4158
028 F030000 0
028 F040000 1956188
028 G010000 11240905
028 G020000 23530
028 G030000 0
028 G040000 12204152
028 H000000 0
042 A000000 0
042 B000000 0
042 C000000 100
042 D000000 0
042 E000000 0
042 F000000 0
042 G000000 0
042 H000000 0
043 000000 71
044 000000 0
062 A000000 Y
062 B000000 101.5
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 73
063 B000000 0.0
064 A000000 N
064 B000000 N
066 A000000 N
067 000000 N
068 A000000 N
068 B000000 N
069 000000 N
071 A000000 0
071 B000000 0
071 C000000 0
<PAGE> PAGE 4
071 D000000 0
072 A000000 6
072 B000000 75451
072 C000000 0
072 D000000 0
072 E000000 0
072 F000000 3987
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 71
072 U000000 0
072 V000000 0
072 W000000 0
072 X000000 4058
072 Y000000 0
072 Z000000 71393
072AA000000 188
072BB000000 224
072CC010000 0
072CC020000 0
072DD010000 70430
072DD020000 963
072EE000000 0
073 A010000 0.0183
073 A020000 0.0170
073 B000000 0.0000
073 C000000 0.0000
074 A000000 0
074 B000000 0
074 C000000 3607919
074 D000000 0
074 E000000 0
074 F000000 0
074 G000000 0
074 H000000 0
074 I000000 0
074 J000000 0
074 K000000 0
074 L000000 5920
074 M000000 1
<PAGE> PAGE 5
074 N000000 3613840
074 O000000 48760
074 P000000 591
074 Q000000 0
074 R010000 0
074 R020000 0
074 R030000 0
074 R040000 8181
074 S000000 0
074 T000000 3556308
074 U010000 3487813
074 U020000 68531
074 V010000 1.00
074 V020000 1.00
074 W000000 0.9996
074 X000000 1680
074 Y000000 0
075 A000000 3897567
075 B000000 0
076 000000 0.00
077 A000000 Y
SIGNATURE MARIE E. CONNOLLY
TITLE TREASURER
<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-28-1994
<PERIOD-END> AUG-31-1994
<INVESTMENTS-AT-COST> 3607919
<INVESTMENTS-AT-VALUE> 3607919
<RECEIVABLES> 5920
<ASSETS-OTHER> 1
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 3613840
<PAYABLE-FOR-SECURITIES> 48760
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 8772
<TOTAL-LIABILITIES> 57532
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 3556344
<SHARES-COMMON-STOCK> 3487813
<SHARES-COMMON-PRIOR> 4442145
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (37)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 0
<NET-ASSETS> 3487777
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 75451
<OTHER-INCOME> 0
<EXPENSES-NET> 4058
<NET-INVESTMENT-INCOME> 71393
<REALIZED-GAINS-CURRENT> (36)
<APPREC-INCREASE-CURRENT> 0
<NET-CHANGE-FROM-OPS> 71357
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 70430
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 11111365
<NUMBER-OF-SHARES-REDEEMED> 23308
<SHARES-REINVESTED> 12089006
<NET-CHANGE-IN-ASSETS> (939754)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 3987
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 4058
<AVERAGE-NET-ASSETS> 3897567
<PER-SHARE-NAV-BEGIN> 1.00
<PER-SHARE-NII> .018
<PER-SHARE-GAIN-APPREC> 0
<PER-SHARE-DIVIDEND> .018
<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>
<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-28-1994
<PERIOD-END> AUG-31-1994
<INVESTMENTS-AT-COST> 3607919
<INVESTMENTS-AT-VALUE> 3607919
<RECEIVABLES> 5920
<ASSETS-OTHER> 1
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 3613840
<PAYABLE-FOR-SECURITIES> 48760
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 8772
<TOTAL-LIABILITIES> 57532
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 3556344
<SHARES-COMMON-STOCK> 68531
<SHARES-COMMON-PRIOR> 53916
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (37)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 0
<NET-ASSETS> 68531
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 75451
<OTHER-INCOME> 0
<EXPENSES-NET> 4058
<NET-INVESTMENT-INCOME> 71393
<REALIZED-GAINS-CURRENT> (36)
<APPREC-INCREASE-CURRENT> 0
<NET-CHANGE-FROM-OPS> 71357
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 963
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 129540
<NUMBER-OF-SHARES-REDEEMED> 221
<SHARES-REINVESTED> 115146
<NET-CHANGE-IN-ASSETS> (939754)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 3987
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 4058
<AVERAGE-NET-ASSETS> 56487
<PER-SHARE-NAV-BEGIN> 1.00
<PER-SHARE-NII> .017
<PER-SHARE-GAIN-APPREC> 0
<PER-SHARE-DIVIDEND> .017
<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>
