Portable dynamic balance measuring instrument

The utility model relates to the technical field of dynamic balance measuring instruments, and discloses a portable dynamic balance measuring instrument which comprises a box body and a sliding rail, a box cover is rotationally installed at one end of the box body, the size specification of the surface of the box cover is matched with the size specification of the top of the box body, and a measurer is fixedly connected to the inner wall of the box body. Two storage boxes are movably installed on the inner wall of the box body, the two storage boxes are symmetrically distributed with the measurer as the axis, an expansion box is slidably installed on the surface of the sliding rail, sliding grooves matched with the sliding rail are formed in the two sides of the expansion box, and the surface of the sliding rail is fixedly connected with the inner wall of the box body. According to the scheme, the sliding grooves in the two ends of the expansion boxes are connected with the surfaces of the sliding rails on th