A QoS routing selected algorithm based on improved genetic algorithm was proposed. In this algorithm, the resource expenditure and load-distributed of network were optimized as object function, which includes QoS parameters such as bandwidth, hop counts, cost, delay etc. It balances load, makes good use of network resource, reduces congestion of network, and increases throughout with minimized network resource. Simulation results indicate that the algorithm is efficient and reasonable to solves multi-objective programming.