To solve the cooperative capture problem of multiple aircrafts, a partition method of capture space based on differential game under weighted guidance law is proposed. Aiming at the relative motion model of multiple aircrafts and targets, an appropriate performance function is selected, and a many-to-one cooperative hunting differential game model is established; the optimal control strategies of aircrafts and targets are obtained by using the Hamiltonian function method, and the optimal trajectories of the zero control miss distance of each aircraft are obtained; Taking two aircrafts as an example, a two-to-one cooperative capture scenario is set up, and according to the sign and magnitude relationship of the initial zero-effort miss distance of the two aircrafts, the relevant definitions of each aircraft in the state of individual interception and cooperative capture are given, and according to the optimal trajectory of each aircraft in the state of zero-effort miss distance, a division method of cooperative capture space is given around the initial zero-effort miss quantity; Three specific simulation scenarios are set up, and the verification results prove the accuracy of the method.