The insulator decontamination robot is linked with the rapid opening and closing shell. The machine frame device or the shell device comprises a first fixing frame and a second fixing frame, a secondelectric push rod and an open-close type telescopic device are installed between the first fixing frame and the second fixing frame, the fixing end of the second electric push rod is connected with one side of the first fixing frame, and the whole machine frame device or the shell device is of an annular structure. When the device needs to sleeve the periphery of the insulator, the device can openthe electric push rod on one side of the device, thereby facilitating the sleeving of the device at the periphery of the insulator, and then achieving the automatic closing. When the quick opening and closing device needs to be taken down from the insulator, the electric push rod on one side of the quick opening and closing device can be automatically opened, and after the quick opening and closing device is taken down from the insulator, the opened electric push rod can be automatically closed.