The invention relates to patulous multiple tyres TPMS system that comprises emitter, antenna, main controller, and code card cage, code module, when said main controller is started or repositioned, reading ID code of all code module, and storing corresponding relationship between the ID code and tyre identity; sensor of said emitter converts the change of tyre pressure and temperature to corresponding changeable electric parameters via electronic element, and emitted by the emitting circuit after process; wireless signal is received by antenna, and decode by modulation and demodulation circuit, then data is transferred to main controller CPU via the SPI bus, the CPU saves data to corresponding area according to corresponding relationship of tyre identification, and displays data in corresponding data area. Comparing with current technique, the invention possesses characters that the performance is stable, and it is easy to be realized, and convenient to be expanded.