Supporting anchor rod pull-out test device

The utility model discloses a support anchor rod pull-out test device, which comprises a center hole jack and a U-shaped adjusting frame, the lower end faces of two groups of supports of the U-shaped adjusting frame are respectively provided with a group of first hinging pieces, the lower ends of the two groups of first hinging pieces are respectively provided with a group of supporting plates, and the upper end faces of the two groups of supporting plates are respectively provided with a group of sliding grooves. The inner walls of the bottom ends of the two sets of sliding grooves are each provided with a set of sliding blocks, one side of each sliding block is provided with a set of first electric push rod, the upper ends of the two sets of sliding blocks are each provided with a set of second hinge pieces, and the two sets of second hinge pieces are each connected with a set of connecting rods. The pressure of the gravity of the center hole jack on the anchor rod is reduced, so that the center hole jack c