The invention provides a non-contact photoelectric control circuit for an aerostat vent valve. The circuit comprises a power source comprising two output ends. At the same moment, the two output ends output a high potential and a low potential correspondingly; power supply ends of two switching state monitoring circuit are connected with the two corresponding output ends of the power source. Two ends of an execution mechanism are connected with the output ends of the first switching state monitoring circuit and the second switching state monitoring circuit correspondingly. At the same moment, only one switching state monitoring circuit works. When being powered by the power source, the first switching state monitoring circuit outputs a first rotation-stop control voltage signal and at the same time the second switching state monitoring circuit is in a standby state. When being powered by the power source, the second switching state monitoring circuit outputs a second rotation-stop control voltage signal and at the same time the first switching state monitoring circuit is in a standby state. The control of driving the execution mechanism to rotate forwardly and reversely by using the first rotation-stop control voltage signal and the second rotation-stop control voltage signal at the two ends of the execution mechanism.