The invention is a kind of gliding block universal-joint spindle automatic lubricating device. The invention belongs to mechanical manufacturing field, especially refers to a kind of automatic lubricating device for middle board roller copper gliding block universal-joint. The device is made up of rollers, palm end, tiger's mouth, gliding block, universal-joint spindle, oil adding hole. The character lies in: there sets an automatic oil supplying device on the universal-joint spindle, the oil supplying device includes an oil pipe, a fixing clamp ring, a plunger pump, a plunger pump post rod, template, tile mold, the plunger pump is fixed with the universal-joint spindle with the fixing clamp ring, and rotates with the universal-joint spindle, from the plunger pump to the oil adding hole the invention uses copper oil pipe to connects them and fixes them on the universal-joint spindle. The template is fixed with the universal-joint spindle tile sides with screws. The structure is simple, and compact.