In order to solve the problems of the nonlinear and uncertain effects in the heterogeneous space environment,the actuator input saturation constraint,and the difficulty of collaborative scheduling with limited resources in attitude control of multiple heterogeneous spacecraft,a robust consistent tracking control strategy with saturated input and uncertain dynamics for heterogeneous spacecraft is proposed.In the proposed control strategy,the dynamic weight matrix of the reference system is allowed to be completely unknown,so the existing method has no feasible solution.By introducing the directed spanning tree assumption,a new weighted averaging method is proposed to construct the distributed observer dynamics.Then,a new class of robust consensus tracking controllers is designed by combining distributed observations with nonlinear dynamics.The simulation results show that when synchronous behavior and distributed observation dynamics can be obtained simultaneously and to reach the leader state,the problem of robust consistency of heterogeneous systems will be solved.At the same time,using the dynamic model of heterogeneous spacecraft,the parameter conditions of different performance indexes are designed,and the effectiveness of the proposed method is verified and analyzed.