Cable intermediate joint welding process

The invention provides a welding process for a cable intermediate joint. The welding process comprises the following steps of: 1, connecting wire core conductors; equal-diameter connection of cable core conductors is realized through a sweat soldering technology. 2, recovering the inner semi-conductive layer; after the semi-conductive belt is wrapped, a mold is installed, heating is carried out for temperature rise, fusion connection is carried out, smooth polishing is carried out, and equal-diameter recovery is achieved; 3, recovering the main insulating layer; an insulating material is extruded to the surface of the inner semi-conductive layer, one-time mold injection hot melting forming is carried out, and fusion combination is achieved; 4, recovering the outer semi-conductive layer; uniformly coating semi-conductive paint, naturally air-drying, wrapping a semi-conductive belt, and then wrapping a copper shielding net to realize the recovery of an outer semi-conductive layer; and 5, recovering the outer sh