The invention discloses an insulating clamping semi-conductive belt and a manufacturing process thereof. The semi-conductive belt includes a conductive shielding layer and insulating layers arranged on both sides of the conductive shielding layer. The conductive shielding layer is a conductive carbon black colloid. The conductive carbon black colloid comprises the following components by weight: 30-41% of silica gel, 8-10% of nano hollow carbon tubes, 50-58% of ethyl ester and 1-2% of curing agent. The insulating layers are arranged on the two sides of the conductive shielding layer, which canensure that cables will not leak electricity, conduct electricity or cause an electric shock under damage and breakage. The conductive carbon black colloid in the middle is made of a non-metallic material, tests show that the surface resistance is lower than 100 Ohm and the volume resistance is lower than 1*10<3> Ohm, and the electric field can be homogenized. The insulating clamping semi-conductive belt can be widely used in inner layer wrapping and shielding of ultrahigh-voltage cables and high-voltage mine cables, especially in cables made of non-metallic conductors.