The growth and population compositions of freshwater shrimp (Macrobranchturn nipponensis) were studied in Sunqiao channels, Chuansha County, Shanghai Municipality.The growth period is devided into two evident stages.As an example of the increase of the length (L_t) of male shrimp, the growth equation is L_t=3.38[1-e^{0.4948(l+0.1674)}] (r=0.941) for the former stage and the infection point is at t=2.07 month age.For the latter stage, the growth is fitted to Logistic curve, with the equation of L_t=6.573/(1+e^{2.1805-0.27871}) (r=0.970) and the infection point at t=11.07 month age.After analysing the catching population, we found that the month age ranges from 0 to 15, the range of the length and body weight is 1.30-6.58cm and 0.060-13.Og, respectively.There are two kinds of population in a year, namely the summer population which is from July to the next October, the autumn one from September to the next December.The population of the male shrimps is greater than that of the female shrimps.the monthly sex ratio(♀/♂) ranges from 0.61 to 1.35.