According to the ambiguity of the detection method of the center height difference of the bearing seat of the supporting wheel in GB/T 32994-2016 "Rotary Kiln for Cement Industry" and JB/T 8916-2017 "Rotary Kiln", by the methods of the ambiguity analysis of the definition of the center height of the bearing seat, the analysis of the factors affecting the center height of the bearing seat at both ends of the bearing group and the problems existing in the traditional detection method , it put forward the reasonable detection method of bearing seat center height of rotary kiln supporting wheel, the matching method of bearing seat center height difference and the assembly inspection method of bearing group supporting wheel center height difference. The principle of paired detection is introduced, and the detection accuracy is analyzed. It is concluded that the center height of the ball center of the bearing seat can be measured by measuring the diameter of the oil groove, the diameter of the spherical surface and the depth of the bottom of the oil groove; the center height difference of the ball center of the bearing seat can be calculated by means of the auxiliary measuring frame; and the center height difference of the two ends of the bearing group can be calculated by measuring the dimensions of the parts of the bearing group; the detection method can not only be used for the center high qualified inspection of the bearing seat, but also for the matching of the center height difference of the bearing seat of the same bearing group , and the judgment of whether the center height is reworked can also be made through the matching inspection. The measurement and control methods make up for the vacancy of the detection method of the center height difference of the bearing seat in the standard, and revise the standard. It provides a reference basis and has a guiding significance for the detection of the difference between the central height of rotary kiln and the central height of the bearing seat.