The invention discloses a method for improving the processing precision of a rubber sole. The method comprises the following steps: placing a base horizontally, placing rubber to be cut at the top of the base, further placing a sole mold plate on the rubber, and positioning the sole mold plate between two fixing blocks; moving a moving plate to position a pressing rod on the moving plate above the sole mold plate, then rotating a fixing rod to enable the fixing rod to fix the moveable plate on a vertical plate, and further rotating a pressing rod so as to tightly press the sole mold plate by the pressing rod; pushing a support rod, moving the fixing blocks to the tail end of the sole mold plate, rotating a cutter, inserting the cutter into the rubber, and enabling the tip of the cutter to contact the base; pushing the support rod along the direction of a chute, driving the fixing blocks to move along the outline of the sole mold plate, cutting the rubber by using the cutter on the fixing blocks, and cutting the rubber according to the shape of the sole mold plate, thereby completing of manufacturing of the rubber sole.