Reel front-back position adjusting device

The invention provides a reel front-back position adjusting device. The reel front-back position adjusting device comprises a header, a reel, a sliding shaft sleeve, a reel support, a reel rotating shaft and a front-back position adjusting mechanism. The reel is installed on the reel support through the sliding shaft sleeve, the rear end of the reel support is fixed to the reel rotating shaft, andthe reel rotating shaft is rotationally installed on the header. The front-back position adjusting mechanism comprises an executing element, a driving assembly, an adjusting shaft and a driven assembly. The executing element is connected with the sliding shaft sleeve on a driving side, one end of the driving assembly is hinged to the sliding shaft sleeve on the driving side, the other end of thedriving assembly is fixedly connected with one end of the adjusting shaft, the driven assembly is located on a driven side, one end of the driven assembly is hinged to the sliding shaft sleeve on thedriven side, the other end