Abstract: Through tracking and recording Gleditsia psylla occ urrence and development for years, Gleditsia psylla breeds 4generations a year in Baotou region, especially lack of rain in the may to June and September to october, causing tree growth unhealth,scattered pest secretion serious, affect plant growth and ornamental landscape. Based on the many experiments, it is concluded that3% hypertonic benzene oxygen wei missible oil at 3 000 times liquid spraying prevent Gleditsia psylla was most effective.