Abstract: the main period of the moth appeared is from the middle ten days of April to the latter part of August.there is not another peak-hour except overwintering generation in the period from the end of August to the beginning of May. The synthetic pheromon can catch the male moth at night，the sole rush hour is 0：00-3：00. The synthetic pheromon can forecast the extent of injury，the formula is y =0.0181x and y =1.0242x.in this formula,y is the amount of the catched males,the first x is the amount of the damaged jujube trees，and the next is the larva density in the forest.