Abstract: The reliability level of automatic production system is determined by the reliability level of equipment and various key influencing factors. At present, the allocation of production system reliability usually divides the equipment level of subsystem, and lack of evaluation of influencing factors and subsystem cost factors. Therefore, the reliability allocation of production system needs to divide the components of the system, consider all influencing factors, The reliability allocation index of production system is allocated to production equipment layer by layer by reasonable reliability allocation method. Provide valuable advice and suggestions for enterprises to reasonably plan the layout of each equipment in the production line system.