A rapid current-limiting fuse protector of an offshore platform power grid comprises a base, a rapid isolator, a current-limiting fuse protector body, an electric appliance controller, a high-voltage isolation transformer and a low-voltage signal control box, wherein the rapid isolator, a supporting insulator and the high-voltage isolation transformer are arranged on the base; one end of the rapid isolator is connected with the supporting insulator, and the other end of the rapid isolator is connected with an electronic controller and the high-voltage isolation transformer; the high-voltage isolation transformer is connected with the low-voltage signal control box, the current-limiting fuse protector body is connected with the rapid isolator, and the low-voltage signal control box is connected with the high-voltage isolation transformer through a low-voltage signal control box connecting port formed in the high-voltage isolation transformer. Total energy of the fault current is greatly reduced (the total energy is about one twentieth that of a common breaker), so that electric main equipment is effectively protected from damage.