Wangxin Hatchery situated in the suburbs of Shanghai, is one of the largestfry supplying base in the East China. The hatchery has produced more than 8 hundredmillions of fry in 1993. Since 1992, a computer aided research work has been carried out infry production of the hatchery, and we also analysed synthetically some relevant factors infry production accordlng to the data for last 3 years.1. A productivity analysis of parent fish: Taklng the silver carp of over 12 years old putinto used, for example, the average about 1 million fry have been produced by per pair of theparent are in their prime of life. Cornparing the benefits of per unit weight of parent fish atdifferent age stages indicates that the silver carp whose age exceed 16 and breading abilitydecreasing is supposed to be cleaned out, while the bighead crap and grass carp could beprolonged to 18-20 years old.2. An utilization analysis of parent fish: During 1992 - 1994, the amount of variousparent fish being used was only 16% of the total number of parent fish stocked. It issyggested that the production plan should be make more reasonable and the amount of parentfish reserved shouldn't exceed 5 % of the total expected parent fish.3. A cost analysis of fry production: In 1993, because of the rise of feed expenses, theproduction cost was increased by 26. 85% and the profit was decreased by 50% comparedwith the previous year for per 10. 000 units of fry.4. Analysis of fry market: Usually, the contract order volume mounts to 60-70% ofthe actual sales volume. The annual sales volume is 0. 7-0. 8 billions, of which more than70% is sold to the regions of the north part of China.