The invention relates to an improved coaxial cable connector hot-line mounting technology. The technology comprises the following steps of (1) protective layer inductive voltage reduction, (2) hot-line construction protection and (3) coaxial cable connector technology implementation, wherein the step (1) comprises the sub-steps that by the adoption of a vacuum breaker, a cable protective layer is grounded and the potential of the cable protective layer is reduced, the step (2) comprises the sub-steps that by the adoption of a piercing tool, a coaxial cable insulating layer is pierced at the upper end of a coaxial cable to be constructed, and a coaxial cable core is grounded, and the step (3) comprises the sub-step that a special construction technology of a coaxial cable connector is adopted to conduct construction. Compared with the prior art, the improved coaxial cable connector hot-line mounting technology has the advantages of being simple, capable of reducing cost and the like.