The invention provides a portable broken line connecting device for an electrician, and belongs to the field of power. The device comprises a cylinder, and the cylinder is vertically through. Moreover, the left and right sides of the outer wall of the cylinder are fixedly connected with bar-shaped groove bodies. Meanwhile, the left and right bar-shaped groove bodies are symmetrically provided withoutward notches. The outer walls of the front and rear sides of each bar-shaped groove body are vertically provided with chutes. The bar-shaped groove bodies facilitate the placing of two ends of a broken wire in the grooves in a vertically fitting manner. A sliding plate slides up and down along the chutes. After the ends of the broken wire are placed in the grooves of the bar-shaped groove bodies in the fitting manner, a blade is rotated through a rotating shaft, and the edge of the blade is enabled to cut a wire piece in an inclined manner. Meanwhile, the blade slides upwards along the chutes through the sliding plate, thereby enabling the blade to cut the skin of the wire in an inclined manner, achieving the peeling of the skin of the wire, enabling an internal metal wire to be exposed, and facilitating the wiring. A press handle brings convenience to a user for rotating the blade and pushing the blade through fingers. A universal wheel facilitates the rotation of a sliding rod around an annular wheel groove.