In organization-level maintenance support of warship, the maintenance department is short of forecasting maintenance support scale. Based on the analysis of warship maintenance support characteristic, establish the analysis model of pointing support and concomitancy support use queuing theory, optimize the scheme means of support force and forecast the best scale of support force. Validate the rationality of analysis model by example. The result shows that the method will give decision-making evidence and quantitive support for organization-level maintenance support deparment deciding suitable maitnenace force.