Postosia brevitarsis lewis damaged seriously to farming and forestry in Shihezi in recent years. Its occurrence and damage were investigated. The results showed: ⑴ Postosia brevitarsis lewis occurred and damaged from the earth at the beginning of May, and the population peak of P brevitarsis Lewis occurred in the middle of June. The number of trapped occupied 59.2% and 24.0% of all the chafers trapped from May 25 to June 23 and from June 27 to July 29 separately. The trapping amount of the two together occupied 83.2% of the total. ⑵The attraction impacts of the five formulas of sugar-vinegar mixture for the chafers showed that: formula 3>1>5>4>2. (3) The life span of the adults could last for nearly nine months. The average cumulative amount of eggs was 35 to 72 per female. The egg hatchability was 100% at indoor temperature(25℃), and the egg stage was about seven days. (4) At present Postosia brevitarsis lewis mainly distributed in Shihezi City, suburbs, and surrounding Farms, other Farms haven’t been discovered yet. More than 10 kinds of main agricultural and horticultural crops could be damaged by postosia brevitarsis lewis, especially in corn, sunflower, grapes.