The utility model relates to a belt cleaning device in advance suitable for work piece infiltration detects, including the tube -shape casing, upper shed both sides system at the tube -shape casing has the left and right sides removable cover that the structure is the same, open the suction opening that has the symmetry on the left and right sides lateral wall of apron lower part, the air exhauster is equipped with in the suction opening, the condensate pipe is installed to the symmetry on the left and right sides lateral wall of suction opening lower part, the condensate pipe of snakelike range constitutes the condenser, install condensate collection groove on the left and right sides lateral wall of condensate pipe lower part, the horizontal grid of casing inner space is separated to solid dress on the lateral wall of condensate collection groove below, it needs abluent work piece to place on the grid, trichloro ethylene solution is equipped with in the casing of grid lower part, the heating pipe is installed to bottom at trichloro ethylene solution, the heating pipe is by the outside mains operated of casing. Using the device to carry out prerinse convenient operation, saving time, the liberation manpower can effectively promote the cleaning efficiency.