The utility model relates to the technical field of lead smelting, and in particular relates to an electrolyte liquid supply pipe device used during a lead electrolysis process. According to the utility model, the horizontal end of a left-side liquid supply pipe is welded with and communicates with the left side of a liquid supply main pipe. The vertical end of the left-side liquid supply pipe is connected with one end of a left-side liquid supply elbow through a left-side control valve. The horizontal end of a right-side liquid supply pipe is welded with and communicates with the right side of the liquid supply main pipe. The vertical end of the right-side liquid supply pipe is connected with an end of a right-side liquid supply elbow through a right-side control valve. The utility model provides a controllable liquid supply pipeline system which is capable of performing adjustable distribution, such that a problem of uneven distribution of the electrolyte is solved, electrolysis efficiency is improved, and lead electrolysis conditions are improved. The liquid supply elbows are connected into the electrolytic cells at positions lower than the rims of the electrolytic cells, such that electrolyte overflowing and leaking problems are solved, and electrolyte corrosion to the electrolytic cells is avoided. Anti-corrosion work intensity is reduced, working environment is improved, and working efficiency is improved.