Based on the spaceflight mission characteristics from the dominating country such as US and Russia etc., the data processing of telemetry position control instructions was hard to be judged and the utilization rate of information was low. In view of these questions, a real time processing method of position controlling instructions with fuzzy set theory was presented in this paper. The results of the analysis showed that all acquired outburst information could be fully utilized and more satisfying processing results of the telemetry position instructions could be obtained.