A multi-staging area check method for distributed wireless sensor networks is proposed. The method is different from the zero boundaries and the added middle section method. With this method, the strategy with arbitrary segments for check and adjusting the transmission according to the reliability parameter from the signal strength is achieved. To reduce the transmission energy and reduce the error rate, the methods of the maximum a posteriori (MAP) and equal gain combining (EGC) are applied in the data fusion center for final check. Simulation results show that the proposed method has better adaptability. Compared with traditional method, multi-staging area check method can significantly reduce transmission error rate and reduce the energy consumption of the network.