It was introduced using SLP method on the overall layout of the hydraulic parts factory; Through the basic elements analysis of the hydraulic parts factory and operational units of material flow analysis, obtaining the facility relationship based on the theory of classical systematic layout planning. According to the relationship between logistics targeting parameter values, and it adapted a genetic algorithm to find out the suitable plant layouts; Finally, the optimized layout of the program is cost-comparison method to assess evidence for using SLP layout of the feasibility and optimization.