In order to obtain reasonable and valid AO，allocation model of mine operational availability based on multi-factor is constructed by taking mission requirement，support plan of mine equipment and RMS data from similar systems into account. The paper takes one type of mine as example，allocates operational availability and relative RMS parameters of subsystems synthetically，and verifies the feasibility of this method. This allocation model is reasonable，credible and universal，and can modify the weight coefficient of influence factors based on actual conditions. It can offer theoretical basis and method support for the argumentation and design，use and management of similar weapon equipment.
