The invention discloses a call control method, a mobile switching center and a communication system through several implementations. Wherein, the call control method includes: when the mobile switching center receives the call request message of the voice group call service initiated by the terminal, it judges whether the terminal sending the call request message has the calling authority of the voice group call service, and for the terminal with the call authority to include A group call channel is established in the group call area of the voice group call service. Each implementation mode of the present invention controls the initiation authority of the group call service, facilitates the control of the group call service, facilitates the management of actual service applications, enables good control of wireless resources, improves the service quality of operators, and promotes more standardized use of trunking services , which can effectively solve the defects of random use of wireless resources, inconvenient application management and waste of wireless resources in the prior art.