The invention relates to a magnetron sputtering continuous coating device for micro-nano powder, which comprises a vacuum cavity body (1), a conveyor belt (2), rotary vibration devices (3), a continuous blanking device (10), magnetron sputtering devices (11), a collecting bin (12) and a storage bin (13), wherein the rotary vibration device comprises a rotary vibration rod (4), a drive rod (5), a coupler (6), sealing parts (7), a flange (8) and a rotary motor (9). According to the device, the rotary motor (9) can be placed outside the vacuum cavity body (1), influences of a magnetic field, an electric field and temperature on the motor are avoided, process stability and service life of the device are increased, meanwhile, the rotary motor (9) and the rotary vibration rod (4) are used to drive the conveyor belt (2) to vibrate, shaking of the powder on the upper surface of the conveyor belt is realized, and coating uniformity of the powder is ensured.