U888 signal system vehicle-mounted ATC and vehicle interface debugging box

The invention discloses a U888 signal system vehicle-mounted ATC and vehicle interface debugging box, and the debugging box comprises a power supply module which is used for supplying power to a pure output module of the debugging box; the pure input module is used for turning on a corresponding indicating lamp on the debugging box by operating vehicle external equipment and giving out an input function signal; the pure output module is provided with a control switch through a debugging box, so that the electric signal is transmitted to vehicle equipment, and an output function signal is given; an external electric signal is collected and input through a control switch of the debugging box and then is output to the outside through the debugging box, and a driving control function signal is collected; the ATP/ATO function is effectively debugged, static testing is carried out on connecting lines and functions related to train signals, equipment short circuit and damage caused by train wiring problems are avoid