This paper deals with the theory model construction of the multiple-species economic threshold of farmland rodents in rice fields, South China. Three rodent species including Rattus rattoides Hodgson, Bandicota indica Bechstein and Mus musculus, were studied. The sampling sites were selected in Dongguan City and Boluo City of the Pearl River Delta; where characterizes with alluvial plain and few hills or low mountains. Two multiple linear regression models were constructed by analyzing the relations between...