Taking the warm standby redundancy system as the research object, considering the scheduling and allocation of maintenance forces when multiple maintenance stations support multiple systems, this paper introduces the multiple asynchronous vacation policy of multiple maintenance stations. For the past research, the model known conditions are caused by typical distributions such as exponential distribution. For the problem of excessively stringent conditions, continuous phase-type(PH) distribution is used to describe the system working unit life, the warm standby unit life, and the maintenance station vacation time and maintenance time, and a more general system reliability analysis model is established. Some reliability features such as system reliability, system steady-state availability etc, and some maintenance station steady-state features such as the number of steady-state busy station etc are given. Finally, the numerical application verifies the applicability of the model, and demonstrates the influence of changes in the number of maintenance stations and system warm standby units, and the changes in the vacation rate and repair rate on the system reliability features. The results show that the reliability model can effectively reproduce the influence of multiple maintenance stations scheduling on the reliability of the redundant system, and provide theoretical basis and practical reference for the rational arrangement of the number of maintenance stations and the optimal configuration of the number of system units.