A joining part is used for combining a first component and a second component awaiting combining, wherein, the first component is congruent on the second component and the first component and the second component are respectively provided with a corresponding opening hole. The joining part comprises an elastic coil, an extending wire rod and a hook stop part. The elastic coil is provided with a first end and a second end the external diameter of which is at least bigger than the opening of the second component, so the second end keeps pressing the bottom face of the second component. The extending wire rod extends to the second end passing through the elastic coil from the end part of the first end of the elastic coil. The hook stop part is formed out of the second end by the extending wire rod passing through the elastic coil and the outline dimension of the hook stop part is at least bigger than the diameter of the first opening to catch the top face of the first component.