Abstract: Effects of stocking densities and diets on growth and survival of Chinese mitten crab (Eriocheir sinensis) during its larval stages(C1-C3) were tested under laboratory conditions. Four stocking densities D1 (75 ind/m2)、D2 (150 ind/ m2)、D3 (300 ind/ m2) and D4 (450 ind/ m2) were designed. The results shows that the body weight obtained the highest value in D2, and was significantly higher than D3 and D4 in C1 and C2 satges(p＜0.05). Survival rate declined significantly with the increasing larval stages, and obtained the highest result in D1 and D2, followed by D3 and D4. In addition, the relative contents of HUFA and n-3PUFA in C1 stage reared with lower stocking densities D1 and D2 are significantly higher than D3 and D4 (p＜0.05). As to dites experiment, larval crab fed with formula diet obtained highest body weight compared to mixed diet and live diet, especially in C1 and C3 stages(p＜0.05). Survival rate reached the highest in F1 , followed by F2 and F3 and larva crabs fed woth live diet obtained the lowest survival rate in C2 and C3 stages(p＜0.05). The relative content of total lipid was the lowest in larval crabs fed with live diet, which was the same variation trend as HUFA, n-3PUFA and n-6PUFA(p＜0.05). The results proved that stocking densities and diets had significant effects on growth and survival in larval stages, which may provide some basic information to improve the production of larval mitten crabs.