The invention relates to a mouse cage type centrifugal radiating cover for a radiating-cooling device of a permanent magnet transmission mechanism. The mouse cage type centrifugal radiating cover comprises a radiating cover and centrifugal fan blades, wherein the radiating cover is an annular structure and is formed by laser cutting or punching molding a thin steel plate, a centrifugal fan blade structure is arranged on a radiating cover body, and the radiating cover is arranged between two steel discs of the permanent magnet transmission mechanism so as to form full enveloping structure for the permanent magnet transmission mechanism. The centrifugal fan blades are in shapes of being bent inwards by a certain angle. A fixing lug is in the shape of being bent by 90 degrees towards the axis direction. According to the mouse cage type centrifugal radiating cover, the air flow can be enhanced, the radiating effect can be improved, and can the problem of the noise caused by various bulges and a steel frame can be effectively eliminated.