The invention discloses a multi-functional electric-pole foundation pit device for line training. The device comprises vertical-pole foundation pits formed by concrete pouring and an electric-pole fastening apparatus above the vertical pole foundation pits. The vertical-pole foundation pits comprise a right trapezoid foundation pit on the upper portion and a cylindrical foundation pit on the lower portion. An inclined side surface of the right trapezoid foundation pit is disposed on the side, and a short side of the right trapezoid foundation pit right aligns to the top of the cylindrical foundation pit. The electric-pole fastening apparatus is in a #-shaped rack structure and disposed above the cylindrical foundation pit, and a cambered bracket is arranged on the inner sides of profile steels on the front side and the rear side of the electric-pole fastening apparatus respectively. When a wire in the air is alive and an electric pole is added in a span of two electric poles, the wire is lifted by 700mm in advance. When a vertical pole is used, the root of the electric pole is 2 meters under the ground, that is, the bottom end of the electric pole is at the bottom of the electric-pole foundation pit, and the 700-mm safety distance can be kept between the pole tip and the live wire after the electric pole is erected, accordingly, safety guarantees are provided for training pole erection.