256 sets of brood fish of grass carp, silver carp, bighead and bluntsnout bream were induced to spawn in the autumn of 1991, and up to 50.4 million frywere obtained. The mean spawning rate, fertilizing rate and hatching rate were 78.2%,71.9% and 75.4% respectively. The fry from autumn propagation could breed intolarger fingerling in the same year (over 10 cm for bighead and silver carp, over 8 cm for grass carp and blunt snout bream). The viability of the fingerling was 37.2%.Compared with the results for once a year spring propagation, the spawning, fertilizing,and hatching rate were generally not affected. Only the egg number decreased 6.8%-9.6%. There are no significant differences in size and weight of eggs and length offry. In grass carp, silver carp and bighead the oocytes develop asynchronously. Theimmature oocytes in the ovary of the brood fish after the spring propagation coulddevelop to full mature under strengthened culture for about 60 days.