Grooving machine for splicing finger joint boards

The utility model discloses a grooving machine for splicing finger joint boards, and relates to the technical field of board processing equipment. A plurality of fixing plates are symmetrically installed on the upper surface of the placing plate, a supporting plate is installed on the upper surfaces of the fixing plates, a groove is formed in the upper surface of the supporting plate, a driving motor is installed in the groove, one surface of the driving motor is rotationally connected with a threaded column, the threaded column is rotationally connected with the groove, and the circumferential side face of the threaded column is in threaded connection with a threaded block. A rotating motor is installed on the lower surface of the threaded block, an output shaft is rotationally connected to the lower surface of the rotating motor, and a telescopic rod is installed on the lower surface of the output shaft. The driving motor drives the threaded block to move on the groove through the threaded column, the posit