For increasing the utilization ratio of agricultural resources,the coupling effects of agricultural system were studied in this paper.Based on the analyses of the characteristics of agricultural resources,the necessities of system coupling for the exploitation of agricultural resources were affirmed.The implications of agricultural system which was divided into six production strata were expounded especially theoretically.The characteristics of each production stratum were described,so as to provide certain theoretical foundation for the study of agricultural system coupling.The structure elements of agricultural system coupling were designed.Through the interrelatedness and interaction between the structure elements in the time sequences,spatial patterns and the ecological processes,the structure elements were coupled in an agricultural system for the mutual complement of superiority.This design was put into practice in mapping town and gained remarkable coupling effects.And how to bring the coupling effects into full play in the process of exploiting agricultural resources was discussed.