The utility model provides a based on incessant communication device of car networking systems real -time data, belongs to car communication network technical field, includes: data acquisition interface gathers external data in order to acquire vehicle state information, inside data acquisition module for gather built -in data in order to acquire vehicle state information, storage module saves the vehicle state information who gathers, main communication module for communicate with long -range main database server, assist communication module for communicate with long -range subsidiary database server, information processing module, the vehicle state information who gathers handle and transmit to the related service ware on through assisting communication module or main communication module. Adopt the two data channel of automobile -mounted terminal, the two redundant configurations of server, the continuity of effectual guarantee real -time data transmission appears unusually or needs this time of upgraded version when remote data storehouse server, can not cause the terminal that automobile -mounted terminal real -time data uploaded to real -time data's integrality has been ensured.