The invention relates to a 10kV three-core cable shrinkage terminal improved mounting technology. The technology comprises the step that (1) a cable outer sheath, a steel strip, an inner sheath and a core filler are stripped according to size; (2) a copper shield and an outer semi-conductive layer of a cable are stripped according to size; (3) main insulation of the cable is cleaned; (4) a grounded wire is mounted; (5) a polyethylene special dedicated adhesive is brushed; (6) two-component RTV is painted; (7) a shrinkage terminal is mounted; and (8) a copper wring terminal is arranged and crimped, and a gap between the wring terminal and the insulation is filled with an insulation tape and is wrapped by a leakage resistance tape. According to the technology process, polyethylene special dedicated adhesive painting and an RTV technology are used to replace a traditional grease painting technology; the cross-linked polyethylene insulation surface can be effectively smoothed; the insulation performance of an accessory is improved; cable material waste is reduced; the mounting difficulty is reduced; and the work efficiency is improved.