Abstract: Direct at the characteristics and drawbacks of existing load balancing scheduling strategy under WebGIS cluster environment, we propose client active load balancing strategy under the WebGIS cluster environment, the research is mainly focused on the architecture of WebGIS cluster without central dispatching center (load balancer) and the active task decomposition method on client-side, finally realizes the load balancing between each service node under WebGIS cluster environment, solves the performance bottleneck problem for transmitting requests in traditional WebGIS model which has a load balancing scheduling center node and the problem of response delay. Finally, we use different number of concurrent users to do simulation experiment, the results show that, compared with the traditional load balancing strategies under WebGIS cluster environment, the client active load balancing strategy designed in this paper can effectively shorten the average response time, improve the concurrent processing capability of WebGIS cluster, the greater the number of concurrent users, the effect is more obvious.