A powder rotary fluidization device and a method thereof are provided. The powder rotary fluidization device includes a support device, the support device is provided with an installing plate, the installing plate is provided with a power device and a fluidization device, and the power device is in transmission connection with the fluidization device. After a position of the fluidization device on the installing plate is adjusted through the support device, the power device is started to drive the fluidization device to rotate, and meanwhile gases are introduced into the fluidization device to process powder. and therefore the problem of poor processing effect on fine powder with high viscosity is solved through the rotatable fluidization device.