In order to solve the problem of human resource overloading in equipment technical preparation process, method of using network planning technology to construct optimization model and using genetic algorithm(GA) to solve resource leveling are proposed. Mathematical model of resource optimization was established by analyzing the characteristics of work stage logic relations in network plan. In the design of algorithms, initial population with logical relationship was generated to reduce illegal chromosome. According to the characteristics of resource leveling, punishment strategy was designed to solve the problem of illegal chromosome. Example shows that, the methods can solve the problems existing in the equipment technical preparation process universally.