Abstract: The willow longhorn beetle is a wood-boring insect．It attacks Salix simonil Carr.，S．Microstachya Turcz.，S．Matsudana Koidz．And Robinia pseudoacacia L．Etc．Two years are required for this insect to complete one generation in Shanxi．The larvae pass the winter in tunnels．Pupation occurs during the last week of May．The beetles emerge in the middle of June，but the peak is on the early of July．The females deposit their eggs in small niches at bases of trunks．The young larvae appear during the last of June and overwinter at the last of October．The effective control measures for this pestare；bury the base of trunk by sand in order to control the beetles to emerge；inject insecticide to the base of trunk to kill the larvae；gather beetles by hand．