This experiment studies the effect of different potassium levels on eggplant biomass，solanine content，solanine accumulation and distribution，so as to understand from plant nutrition view point how to control by certain extent the solanine formation and accumulation in eggplant，and then to improve the taste and flavor quality. Pot experiment was conducted in this experiment. The results indicated that eggplant fruit weight increase was distinct after applying potassium fertilizer. The solanine content in eggplant fruit was reduced remarkably after applying potassium fertilizer，that in other organs were also reduced. During 2 harvesting times，the solanine accumulation in eggplant fruit increased after applying potassium fertilizer，especially with moderate and large quantity of potassium fertilization. But that in fruit base，stem and flower showed declining tendency. The largest solanine distribution was observed in eggplant fruit ，then followed by leaf，and the least was in flower. While，solanine distribution coefficient in fruit base， flower，etc. organs were decreased along with the increase of potassium level. Applying potassium fertilizer could decrease the solanine content in eggplant fruit，which tended to increase solanine accumulation and distribution in eggplant fruit.