Abstract:In 1989- 1995, the natural population life table of zizyphus geometrid Sucra jujubaChu was studied in Taigu County and Jishan County,Shanxi Province Based on the investigatory data,five yearly natural population life tables and one average life table infive years were developed The results showed as follow: 1.All the survival curves from the life tables belong to Price‘s type A. 2. The trend index of one average population was 1 .203. 3.there was significant suppression effect of natural enemies on the larvae of zizyphus geometrid and the index of population control (IPC) was 5.793. 4.The death of overwintering pupae was the key factor affecting population dynam-ics,and the pupals stage was the key stage. 5. A prediction model for the larvl density of zizyphus geometrid was established.Theaccuracy rate of forecast as used in Taigu County and Jishan County in 1995 was more than 90% it is quite available for the control of this insect.