Abstract: Based on the monitoring of population number of rodents in field from 1985—2004 in Linhai, Zhejiang province, population characteristics of rodent composition in field were reviewed. The results showed that population fluctuation submit S pattern of rodent in field in the last more than two decades. And the population numbers of rodent experienced four phases: up-peak-down-bottom and a long-term movement pattern of rodent in field were shown as well. It was established that model to simulate the long-term population fluctuation: Y（t）=22.8818/（1+0.1038e0.2219X）， X={1，2，3，……，n}.The sustainable control of rodent pest were proposed as “on the basis of taking the ecological control, the protection and application of predator such as prohibiting anyone from catching snake and yellow weasel as the main measure, extension of the rodent infestation surveillance and rodent pest control as the key measure, and improve poisoning and classification control and so on. The application area reached 80400 hm2 and kept the rodent density under 3% level from 2000 to 2004.and the rodent damage in these regions were effectively controlled. The notable social, ecological and economic benefits have been obtained in agriculture.