The invention relates to a disconnection control device for an electric connector for satellite testing and launching. The electric connector includes a detachment electric connector and a separationelectric connector. The disconnection control device comprises an industrial control computer, an adapter cable, a satellite-ground long cable, program-controlled power supplies, a photoelectric converter, an optical fiber, a switch, a switching module, a signal conditioning module, a multiplexer module, a multimeter module, an analog acquisition module, a state acquisition module, control software, a general control terminal computer, a test server and a monitoring terminal computer. The disconnection control device realizes adaptive control for detachment electric connector detachment control and separation electric connector separation control, performs statistical analysis on test data such as the voltage, current, disconnecting time and disconnecting times during detachment and separation and gives the performance variation trend of the electric connector in the form of tables and curves; and meanwhile, the disconnection control device has anti-misoperation prevention measures andredundant design means, and improves the safety, reliability and fault-tolerance of thedetachment electric connector detachment control and the separation electric connector separation control.