Existing anti-jamming technologies mainly focus on communication signal space, such as frequency hopping and direct sequence spread spectrum. Inspired by the significant advantages of Reconfigurable Intelligent Surfaces (RIS), and in order to overcome "double fading", multi-active RISs were proposed to explore the communication channel space to anti-jamming in this paper. Specifically, a dynamic heterogeneous redundant channel model was constructed based on multiactive RISs, and a channel domain anti-jamming algorithm was proposed. Firstly, the uncertain jamming information is robustly processed, and the cyclic coordinate descent (CCD) and successive convex approximation (SCA) are used to optimize RISs phase shift matrix and amplitude matrix, respectively. Besides, the closed form solutions of the transmitting beam and the receiving beam are obtained. Secondly, the low complexity algorithm of block coordinate descent (BCD) is used to alternately optimize the above variables. Finally, the greedy algorithm is used to switch and regulate the multiple RISs. Theoretical analysis and simulation results show that the proposed method can effectively improve communication rate under the condition of significant uncertainty of jamming.