The invention provides an old template cleaning machine. The old template cleaning machine comprises a cleaning frame, a cleaning hole, a guide roller, a cleaning cover, a fixed cover, a liftable flushing box structure, a rotatable adjusting brushing base structure, a shielding insulation drying cover structure, an insertion filter collecting frame structure, a U-shaped base, a support pipe, an inverted T-shaped base, a first flushing box, a flushing pump, a conveying pipe and a connecting hose, wherein the cleaning hole is formed in the middle position in the cleaning frame; and the guide roller is axially connected into the cleaning hole in sequence from left to right. Through cooperative arrangement of a second flushing box, a connecting pipe, a flushing pipe, a flushing nozzle, the first flushing box, the flushing pump, the conveying pipe and the connecting hose, water is conveyed into the second flushing box through the flushing pump in the use process and is sprayed out by the flushing pipe and the flushing nozzle, so that templates are conveniently flushed in work.