Abstract: Hasuha lake has high self-purification capacity,has the great value of development and utilization,suit bascally for most fresh water organism to live,had become eutrophication.The water quality conform basically to the national water quality standard for fishery,the main ions and nutrient concentration is rational.The average biomass of phytoplankton is 3.72mg/L,the average biomass of zooplankton is 1.93mg/L,the average biomass of zoobenthos is 1.86mg/m^2,belongs to middle supply capacity of feeds.The total fishery production capability provided by natural biomass is 99565.77kg.The ecological environment ought to be remediated and the biodiversity ought to be restored in Hasuhai lake now,so as to prevent Hasuhai lake transform into algaetype lake with eutrophication.