Three kinds of biochar including straw charcoal,husk charcoal and charcoal were compared by pot experiment.Four levels of straw charcoal including 5 t/hm2,10 t/hm2,20 t/hm2,40 t/hm2,and two levels of husk charcoal and charcoal including 20 t/hm2,40 t/hm2 were set up to study the effects of different treatments on rice growth and soil nutrients.The results showed that three kinds of biomass charcoal promoted dry matter accumulation and yield formation of rice in a certain range,and straw charcoal had the best effect.Compared with the control,the dry matter and yield of straw increased at first and then decreased,reaching the highest at 20 t/hm2.The biomass and grain yield increased by 51.45% and 72.55% ,respectively.40 t/hm2 was the best application of husk charcoal,and the yield was increased by 60.52%.The application of 20 t/hm2 charcoal increased biomass and yield,but application increased to 40 t/hm2 decreased biomass and yield significantly.Appropriate application of biomass charcoal could increase the content of available nitrogen,phosphorus,potassium and total nutrients in soil,with straw charcoal as the best,followed by husk charcoal and charcoal.Carbon content of charcoal was up to 74.28%.Excessive application can significantly reduce the content of available nitrogen,phosphorus and potassium in soil,which is unfavorable to rice growth.