The utility model provides a big dipper electric power data transmission terminal, including beidou terminal, connecting rod, coupling nut, cable and interface, wherein, beidou terminal's lower extreme pass through the connecting rod with cable junction, and the other end of cable is provided with the interface, the upper end of this connecting rod is provided with the end, and beidou terminal's lower extreme is provided with the joint, the cross section of end with the cross section phase -match that connects, and the interior intracavity of this joint is inserted to this end, simultaneously, the design of this connecting rod is for having inside cavity, this cavity is passed to cable one end, and is through the end department of connecting rod, with the joint butt joint of beidou terminal lower extreme, thereby, beidou terminal among the big dipper electric power data transmission terminal can realize splendid leakproofness, has avoided the connection harm of multi -functional cable simultaneously.