The invention discloses a software update method and device of automobile electronic equipment. The method comprises the following steps of a main control chip obtains update data, wherein the update data comprises an issuing data packet and an answering data packet; the main control chip issues the issuing data packet to the corresponding automobile electronic equipment through a CAN (Controller Area Network) bus; the main control chip receives response data sent from the automobile electronic equipment, wherein the response data is data generated when the automobile electronic equipment responds to the received issuing data packet; the main control chip compares the response data with the answering data packet; and if a judgment result shows that the response data is consistent with the answering data packet, the main control chip judges that programming is successful. By use of the software update method of the automobile electronic equipment of the embodiment, the complexity level and the product cost of the software update of the automobile electronic equipment can be lowered, and convenience is brought to the software update of the automobile electronic equipment.