The invention discloses a method for detecting multiple electronic control units of automobiles. The method for detecting multiple electronic control units of automobiles comprises the steps of respectively setting communication parameters of each ECU according to the type of an automobile; respectively communicating with each ECU through the communication parameters; judging whether the communication of each ECU is normal or not and adding the ECUs with normal communication to diagnosis menu list; and respectively carrying out fault diagnosis on the ECUs on the diagnosis menu list to realizethe fault analysis of the whole automobile. According to the method and device, excessive fault diagnosis time is prevented from being consumed on the ECUs which cannot work normally, and then the fault diagnosis and fault analysis efficiencies are improved.