The invention provides a channel distribution method of security services in power wireless private network and a central base station. The method includes receiving the time slot application information sent by a security partition terminal station, the time slot application information includes service priorities of the security partition terminal station; finding the idle time slot in the channels with the divided time slots based on the service priorities of the security partition terminal station; and distributing the idle time slot to the security partition terminal station sending the time slot application information. The central base station is provided with an application receiving module, a time slot query module and a time slot distribution information sending module. The channel distribution method and the central base station effectively reduce the occupation of the channel capacity during the service transmission and improve the utilization efficiency of the wireless spectrum, are low in cost and flexible and high in expandability, and realize mutually independent and rapid transmission of the service data, thereby completing the air interface physical layer isolation of different services and improving the security and reliability of service data transmission.