Abstract: This paper issues a kind of angle measuring tracking method for conical scan without hollow motor in moving cartier satellite communication system. In the paper, it formulates the structure arrangement of the rotating sub reflector, and also the principle of the angle measuring through conical scan, it analyzes the influence of cartier position variance to the angular error calculation, based on the result, it introduces several relevant measures of anti-noise detection in the angle measuring system. The system test has verified that this low cost, simole, stable, feasible proposal is practical.