This part is used to rigidly suspend the joint between each section of current bar profile to maintain the mechanical and electrical connection. It is composed of two connecting plates. Several ribs are designed on the outer surface of the connecting plate to match the inner surface of the current bar profile to realize continuous contact with the current bar profile. The material of the connecting plate is the same as that of current bar profile, and special anti loose measures are adopted for the threaded hole of the intermediate joint to ensure the reliabilily of Lhe anti loose joint.