In the text through analyzing the maintenance and support system of surface-to-air missile equipment is given a process model for the corrective maintenance, preventive maintenance. Spare parts supply and support equipment usage. The model can be used for the surface-to-air maintenance and support analysis and has reference to the maintenance and support simulation research for the other equipment with its good universality.

The method of spare parts support ability possibility is put forward on the operational readiness, and the relation model is built on spare parts and each spare part possibility, the optimized method and arithmetic is established on the lower total expenses under the certain war preparedness request, it is guidance to store the spare parts on the surface-to-air.