Abstract: A packaging structure for a motor casing, comprising an upper cover, a lower cover and a flange, wherein the upper cover and the lower cover are separately located over two sides of a motor spindle, the upper cover and the lower cover are combined into the motor casing for receiving a rotor, a stator, a bearing and a control circuit board of a motor, the upper cover and the lower cover are fastened by at least one first bolt, the first bolt passes through the upper cover in a radial direction of the motor to screw into a threaded hole of the lower cover, the first bolt evades positions of both the rotor and the stator, the flange is a circular member which binds a front end of the combined upper cover and lower cover, and the flange is fastened onto the front end of both the upper cover and lower cover by second bolts.