In order to avoid the uneven energy consumption and energy hole in wireless sensor networks, this study proposes a data forwarding algorithm between clusters based on load division. Firstly, this study analyzes the problem that data forwarding between clusters may lead to energy hole near the sink. Then, the load allocation weight of cluster head is designed to represent the cluster head’s current energy state, data amount and distance. According to the load allocation weight, this study designs a new data forwarding algorithm, which forwards the data to cluster head near the sink. The simulation results show that compared with the basic EEUC algorithm and the classical LEACH algorithm, the proposed data forwarding algorithm has no great increase of energy consumption, prolongs the network survival time, and improves the efficiency of network energy utilization.