The invention discloses a framework system and implementation method of a middleware applied to a car networking, and relates to the technical field of an embedded middleware applied to the car networking. The framework system includes a middleware message bus module, a car networking application component module, a car networking middleware message broker module, a car networking security component, and a car networking communication protocol adaptation layer. The car networking middleware application component forms a standard function component; the car networking middleware message broker is used for analysis and classification of all kinds of messages in the car networking; a remote connection request is verified by a security component; if the remote connection request passed verification, a corresponding application component thread is searched in a car networking message bus; and through the message bus, a message channel is established between a remote terminal and a local application component or middleware message broker, and then communication is carried out. The car networking communication protocol adaptation layer is used to shield differences between a platform and an enterprise protocol, and to provide a unified communication call interface. According to the invention, the reusability of the code and the development efficiency of the application program are improved.