In order to solve the telecommand abnormality due to abnormal execution of direct data management instructions and direct ground instructions in satellite in-orbit management, factors leading to abnormal execution were examined by analyzing the transmission process of satellite telecommand information and working principles of telecommand decoding. At last, the decoding fault was identified as the cause of the abnormality. The thesis consequently proposed a strategy of satellite safety management. Namely safety management was realized by adjusting components’ command control strategies and converting direct commands into data commands for satellites with a single band channel, and the risk of telecommand decoding channel abnormality was reduced by expanding the telecommand uplink channel and increasing the uplink redundancy besides the two methods mentioned above for satellites with multi-frequency telecommand channels. The safety management method has been verified by in-orbit management of failed satellites, which effectively controls the satellite safety risk caused by one channel-decoding fault to a certain extent, and provides reference for the work of timely detection, location and effective avoidance of other major satellite faults.