The invention provides a high-voltage power transmission line hot-line work robot terminal. The terminal is applicable to carrying out an operation of replacing an electrified insulator string. The high-voltage power transmission line hot-line work robot terminal comprises a base, a clamping component, a W-pin pushing-in sliding block and a W-pin pushing-out sliding block, and is characterized in that the clamping component slides axially by taking the base as a sliding rail, the clamping component comprises a first clamping portion and a second clamping portion, and the first clamping portion and the second clamping portion slide towards each other so as to clamp a socket hanging plate of a high-voltage power transmission line; and the W-pin pushing-in sliding block and the W-pin pushing-out sliding block are installed on the first clamping portion and the second clamping portion respectively, the W-pin pushing-in sliding block can carry out axial movement on the first clamping portion, and the W-pin pushing-out sliding block can carry out axial movement on the second clamping portion. The high-voltage power transmission line hot-line work robot terminal provided by the invention can clamp the insulator socket hanging plate of the high-voltage power transmission line accurately and stably, and can replace the insulator string automatically and safely in an electrified condition.