The invention provides a device for detecting eccentric distance of an eccentric sleeve. The device comprises a base, a mandrel and a sleeve; the two ends of the mandrel are respectively rotatably arranged on frame bodies at the left end and the right end of the base; the front frame body of the base is connected with a dial indicator through a dial indicator mounting hole; the central line of thedial indicator mounting hole is perpendicular to and intersected with the axis of the mandrel; the middle section of the mandrel is a conical shaft; the sleeve is of an annular structure, the size ofthe sleeve hole is consistent with that of a central through hole of the eccentric sleeve, and the radius R of the outer circle of the sleeve is consistent with the size R' of the axis of the centralthrough hole of the eccentric sleeve to the eccentric farthest end of the eccentric sleeve. According to the device in the invention, the problem of detection of the hole in the center of the workpiece and the axis eccentric distance between the two ends is solved, the device in the invention is simple in structure, convenient and rapid in operation, reliable in detection result and low in manufacturing cost, and the working efficiency is greatly improved.