Synchronous realization of two magneto-optical traps is one of the fundamental technologies of testing Einstein’s equivalence principle by using atom interferometers. High frequency acousto-optic modulators were used to achieve the lasers for trapping 85Rb and 87Rb simoutaneously, and a dual magneto-optical trap of 85Rb and 87Rb was realized. Based on the dual magneto-optical trap, the dependence of atom numbers in the dual magneto-optical trap on parameters of cooling laser were investigated, and optimized experimental data were obtained. The number of both species reaches to 109 in the dual magneto-optical trap.