The invention discloses a method for testing a vehicular electric control system based on real vehicle running state dynamic real-time playback. The system comprises a data formatting processing module, a real vehicle running state dynamic real-time playback module, a testing task module and a high-level driving I/O (Input/Output) interface module communicating with the electric control system. The data formatting processing module is used for formatting vehicle road-test test data as an input and sending the formatted road-test test data to the real vehicle running state dynamic real-time playback module through a data transmission interface. The testing task module is set in a single test state or a cycle test state according to test requirements. The high-level driving I/O interface module is used for interacting real-time data with the vehicular electric control system based on a data communication interface card, transmitting the real vehicle running state data to a lower computer control system of the electric control system and building a true real vehicle running environment to the lower computer control system. According to the method disclosed by the invention, the real vehicle test number is effectively reduced; the cost is saved; and the development cycle of the electric control system is greatly shortened.