The invention discloses a novel anchor rod, and belongs to the technical field of anchor rods to solve the problem that an existing anchor rod is poor in anchoring performance. The novel anchor rod comprises an anchor rod body in a hollow tubular shape, and the upper end and the lower end of the anchor rod body are open. At least two opening grooves are evenly formed in the bottom of the anchor rod body. The bottom of the anchor rod body is divided into a plurality of anchoring supporting pieces through the opening grooves. A baffle connected with the anchor rod body is arranged on the top of the anchor rod body. A base plate is arranged between the baffle and the anchor rod body and arranged on the top of the anchor rod body in a sleeving manner. According to the novel anchor rod, the procedure that a blasting explosive enabling a pipe wall to be blasted and deform is arranged at the bottom of the anchor rod body is omitted, and damage to an anchor rod structure when the explosive is blasted and the pipe wall is expanded is avoided. During using, hole expanding is conducted through the blasting explosive firstly, the bottom of the anchor rod deforms and is expanded through grouting, and therefore the bearing force of the bottom of the anchor rod is improved. The invention further provides a construction method for the anchor rod. By means of the method, the anchoring performance of the anchor rod structure can be brought into full play.