Lissorhoptrus.oryzophilus kuschel is a kind of phytosanitary injurious insect interna tionally.Its harmfulness is serious,its spreading ways are complicates,its hosts are of wide range,and its ecological fitness is strong. It spreads widely in North America,South America and Asia. At present,it extends to the Manpu of Cijiang Dao Korean,which is contiguous to Jilin province,and which latitude and weather are similar to Jilin Province.This easay discussed the dangerousness if Lissorhoptrus oryzophilus kuschel spreads into our province and the possibility of existance after coming into our province on the points of its distribution and harmfulness, the geographic location of Jilin Province,the kinds of its hosts and the conditions of circumstances of their living,and put forward the way of controlling its spreading by strengthening the phytosanitary of import,and by making the regular phytosanitary investigation in the boundary area.