The invention relates to a componential realizing method for a communication protocol. It defines the uniform interface standard, determines the componential mode, component developing platform, submits the component bank storage, improves the operation system and acquires the running supports. It has advantage to realize the reasonable package to the communication protocol, optimizes the reasonable call to the service realized by the protocol, and maintains excellent backwards compatibility. The componential communication protocol realizes the dynamic load of protocol, supports the repeatability and height configurability of the component, it has a short developing period, excellent transplantation. It is convenient to the assembly of protocol. It replaces the different protocol components through loading, provides each kind of network service function, service quality, especially suitable for the spot which is strict with the real-time, error tolerance and continuity.