Apocheima cinerarius Erschoff (Lepidoptera: Geometridae) is a polyphagous defoliator pest. It is popularly distributed in China, especially in Xinjiang, which is harmful to elm, populus, Hu poplar, walnut and so on. Because the female imagoes of Apocheima cinerarius. do not have wings, and sex pheromone is much safer and better for the environment than pesticides, it's very effective to use sex pheromone to prevent and control of this pest.The main research results in this paper are as follows:1. Identification of sex pheromones of Apocheima cinerarius. Based on the previous research, two kinds of ingredients which can induced EAG changes were found in extracts from sex pheromone gland of virgin female moth, and they were identified further by GC-MS and GC-EAD. The results showed that the probable detected-ingredients are 11-(3-pentyloxiran-2-yl)undecanoate and (7E,10E,13E)-methyl icosa-7,10,13-trienoate. which has the retention time of 34.60 min and 39.02 min seperately ; however, the conclusion requires further certification by the standard substance or a field trap test.2. Synthesis of two known ingredients in sex pheromone of Apocheima Cinerarius Erschoff. Sex pheromones of Apocheima cinerarius. have been found mainly contains two ingredients, Z6-14:OAc and Z4-14:OAc. Synthesis of the two compounds were finished by three different methods. The best synthetic method was selected by comparing the production yield of these two compounds. 6.8 g Z4-14:OAc and 7.5 g Z6-14:OAc was obtained by the best synthetic method. The purity of the synthetic compounds is above 90% by GC-MS. All these works establish the foundation for the field trap test with the two components.3. The Field trap test. Paint the two different combined sex pheromones onto the silicone core lure with a certain proportion, and then conduct the field trap test with two different implements. The number of traped pest was used as an indicator. From the result, these two compounds were identified as the effective components of this kind of sex pheromone, and the best proper ratio and amount of them were determined.Key words: Apocheima cinerarius Erschoff, Field trap test, sex pheromones.