The invention discloses an automatic detection, waste discharge and patching machine. The automatic detection, waste discharge and patching machine sequentially comprises a first roll set, a first machine table, a second roll set, a second machine table and a third roll set. The first machine table comprises a first rack and a detection mechanism, a waste discharge mechanism and a controller, wherein the detection mechanism, the waste discharge mechanism and the controller are arranged on the first rack. The controller controls all mechanisms of the automatic detection, waste discharge and patching machine to operate. The second machine table comprises a second rack and a patching mechanism, wherein the patching mechanism is arranged on the second rack. According to the automatic detection, waste discharge and patching machine, detection work, waste discharge work and patching work are carried out in a mechanized manner; stability is high; work efficiency of detection, waste dischargeand patching is improved; and the production cost is saved.