This paper considers using Rechargeable Sensor nodes (RS) to capture important events. For the defect of simple atomic event information, it considers the composite events composed of multiple atomic events. The paper proposes a novel composite event capture strategy. Firstly, it turns the composite event capture rate into an optimization problem through establishing a mathematical model, and analyzes the main factors affecting composite event capture rate on the whole. Then, it translates the multi-node cooperative problem into a task allocation problem. A total tasks assignment allocation algorithm based on greedy algorithm (TTAA) is put forward, and according to the specific circumstances of each RS (CTAA), a child task allocation algorithm is proposed. Finally, the paper has carried out the simulation experiment, the experimental results show that the proposed strategy can achieve higher rate for the composite event.