It is easy to install, low cost, safe and reliable, and maintenance free. The cable can be branched without the need to cut off the main cable and without the need to strip the insulation of the cable. The connector is completely insulated and can be charged. It can be branched at any position on the cable. There is no need to use terminal boxes or distribution boxes. And the joint is resistant to distortion, shockproof, waterproof, anti-corrosion and aging. The use of insulated puncture clamps for cable branching has obvious comprehensive benefits, and the cost performance is better than the traditional connection method.