The invention provides an intelligent de-icing device for a high-tension transmission line. The device can remove ice quickly and can further cross obstacles, and the application is flexible and reliable. The de-icing device comprises a control mechanism, a de-icing mechanism and walking mechanisms. Each walking mechanism comprises a walking driving device, a walking wheel and an up-down adjusting motor. Each up-down adjusting motor is arranged on an upper adjusting block, and an up-down limiting rod penetrates through each upper adjusting block. Each up-down adjusting motor drives an up-down adjusting lead screw, and a nut which is matched with each up-down adjusting lead screw is arranged on one corresponding lower adjusting block. Each up-down limiting rod penetrates through the corresponding lower adjusting block, each lower adjusting block is connected with a horizontal adjusting block, and each horizontal adjusting block is arranged on a small platform. A large platform is arranged below the small platforms. According to the intelligent de-icing device, the walking mechanisms can move in three dimensional directions, when the device encounters the obstacles, the corresponding motors work so that the obstacles can be crossed, and operation is flexible and reliable.