The invention belongs to the technical field of engine detection, and particularly discloses a centering adjusting device for engine detection. The centering adjusting device is characterized by including a detection mechanism and an adjusting mechanism, wherein the detection mechanism and the adjusting mechanism are arranged on the rack; the adjusting mechanism comprises a transverse shifting piece and a vertical shifting piece; the detection mechanism comprises a fixed disc and a sleeve, a circular track is arranged on the fixed disc, a telescopic rod piece is hinged to the center of the endface of the sleeve, the telescopic rod piece comprises a rotating rod and a cavity, the cavity is clamped in the round track, a sliding block, a first switch and a second switch are arranged in the cavity, and the second sliding block is slidably connected in the cavity, the first switch and the second switch are located on the two sides of the second sliding block, the first switch and the second switch are arranged in the cavity in a sliding mode, the second sliding block is fixedly connected with the rotating rod, a first conductive piece and a second conductive piece are arranged on the inner side wall of the circular track, the first conductive piece is electrically connected with the transverse displacement piece, and the second conducting piece is electrically connected with the vertical shifting piece. The device has the advantages of being simple in structure and low in cost.