The invention relates to a cable T terminal comprising a substrate, sliding rails, a shell, contact plates, a fixing hole, a top lid, a fixing screw, clamping grooves and a groove, wherein the sliding rails are arranged at central line positions on the inner sides of left and right sides of the substrate, the clamping grooves are formed in tops of both left and right sides of the substrate, both the left and right end faces of the top lid are connected with the substrate via the clamping grooves, the fixing screw is installed at the center position of the top lid, the two contact plates are arranged between the base plate of the substrate and the top lid, the shell is sleeved on the outer part of the substrate, and the fixing hole is formed in the bottom of the shell. The cable T terminal is convenient to install, saving in man-hour, simple in structure, low in cost, and capable of greatly reducing engineering expense.