Abstract:Hylobitelus xiaoi is a new pest insect that bores seriously in base trunk bark of the Pinus massoniana and Pinus elliottii in recent years. We researched preliminary biological characteristics of Hylobitelus xiaoi by investigating and observing outside. It is effective to use 16% chongxianqing oil and 1.8% abamectin oil by injecting into excrete hole 3 mL per hole ,the corrected mortality rate of the pest insect was over 90% in 15 days.