Several methods were employed to disseminate the identification,damage,the prevention and control technology,promote the recognition rate of the quarantine pest Leptinotarsa decemlineata in the potato planting area in northeast China.On that basis,32 stations were set for L.decemlineata monitoring in Jilin Province,Liaoning Province,Heilongjiang Province and eastern region of Inner Mongolia in 2009 and 2010.The investigation area and monitoring area was 439 hectare and about 1.93 billion hectare,respectively.The pest was not detected.Further more,the invasion risk was analyzed and control strategy of L.decemlineata were put forward according to its distribution and spread characteristic as well as its dispersal in the Russian Far East.