Abstract: Rhbdophaga salics Schrank is an important pest which endanger osier in Yellow River Basin and region along huaihe river. By means of indoor and field rearing and observation,we master its main biological characteristics and carry out chemical control tests. Experimental results show that Rhbdophaga salics Schrank has five generations per year in low-lying area along huai river. The matured larva overwintered in the galls of damaged wickers in the current year．The peak time for the larvae’s hatching is first ten-day of April and May, which should be the focus period of control. According to chemical control experiment of four chemicals, laboratory toxicity of acetamiprid is the highest, the LC50 values is 9.1105 mg?L-1,while which of chlorpyrios is the lowest. Field control efficacy of imidacloprid and acetamiprid after 7 days are both over 50 percent, so imidacloprid and acetamiprid could be used as optimum agents in field control of Rhbdophaga salics Schrank..