Abstract: In order to screen out the optimal coverage of culturing Eriocheir sinensis in pond in Qinghai, weight, the survival rate and growth condition of Eriocheir sinensis under different coverage of water were compared. Results showed that when the coverage of waterweed in pond was 60%-80%, it was benefit for the growth of Eriocheir sinensis, furthermore Eriocheir sinensis had higher survival rate and size.