Protocol stack simulator of mobile communication system

The invention discloses a protocol stack simulator of a mobile communication system, which comprises a communication adapter unit, an application adapter unit, a non access layer simulation unit and a control interface unit, wherein the communication adapter unit provides a corresponding communication adapter function according to a communication manner between the communication adapter unit and an MMI (Man Machine Interface); the application adapter unit provides an application adapter layer function of a mobile communication system protocol stack; the non access layer simulation unit provides a non access layer function of the mobile communication system protocol stack; and the control interface unit provides an interactive interface with a user, receives a request message from the non access layer simulation unit, displays contents of the request message, provides operation control of network information set and network interactive services, and sends a response message and an indication message generated by the operation to the non access layer simulation unit. The technical scheme of the invention provides a complete protocol stack function simulation for MMI development and debugging; meanwhile, development complexity is reduced.