The experiment was carried out to study combining ability and genetic parameters of 10 hybrid and 5 inbred lines.The results showed that yield per plant,stay green degree,bast strength,root pulling force,leaf area index showed strong heterosis performance,in which the positive part was significantly greater than the negative part,and the hybrid vigor index was high.However,the mid-parent advantage and heterosis were mostly negative part for leaf of value.Plant leaf angle had less heterosis and heterosis indices were about 100%.