The invention discloses a single locomotive simulated double-machine reconnection microcomputer display method. The method comprises the following steps that firstly, a short wiring line is manufactured on a port of a local microcomputer cabinet reconnection socket, one end of the short wiring line is connected with a sending port of a local microcomputer cabinet, the other end of the short wiring line is connected with a port, for receiving assisting microcomputer cabinet data, of the microcomputer cabinet, and the data is sent to a local microcomputer display screen after being cached and unpackaged by a local microcomputer; secondly, a short wiring line is manufactured on a port of an assisting microcomputer cabinet reconnection socket, one end of the short wiring line is connected with a sending port of the assisting microcomputer cabinet, the other end of the short wiring line is connected with the port, for receiving local microcomputer cabinet data, of the assisting microcomputer cabinet, and the data is sent to an assisting microcomputer display screen after being cached and unpackaged by an assisting microcomputer. According to the single locomotive simulation double-machine reconnection microcomputer display method, a single locomotive can be used for carrying out fault detection on hardware of the single locomotive, the difficulty of abnormal fault searching during double-machine reconnection is reduced, and the working efficiency is improved easily.