Work piece transmission device and double -deck maintenance platform

The utility model relates to a workpiece transmission device, including conveying belt device and width adjusting device, conveying belt device includes along parallel two the transmission band installing supports that extend of transmission direction, arrange respectively at inboard relatively two transmission bands of two transmission band installing supports and be used for driving the transmission band actuating mechanism of transmission band that width adjusting device is used for adjusting two width between the transmission band installing support. The utility model discloses still relate to a double -deck maintenance platform, including the support and arranging the work piece transmission device of lower floor on the support, upper work piece transmission device and a plurality of maintenance platform, the work piece transmission device of lower floor is used for the transmission to treat the work piece of maintenance, and upper work piece transmission device is used for transmission maintenance work