The invention discloses a laser anti-collision control system for an aluminum-electrolysis multi-function crane and relates to the field of aluminum electrolysis industry equipment. The system comprises a multi-function crane, a laser transmitter fixed on one side of the multi-function crane, a laser receiver, an operation controller fixed on the multi-function crane, an alarm, a travel control relay, and a target reflector fixedly on a corresponding side adjacent to the multi-function crane. The laser transmitter transmits a detection wave and the detection wave is reflected by the target reflector. The reflected wave is received by the laser receiver. Through the treatment of the operation controller, the laser ranging value is obtained and the alarm and the travel control relay are controlled to run. According to the technical scheme of the invention, a larger laser ranging sample can be obtained, and the laser ranging precision is higher through data processing. Meanwhile, the anti-collision precision is high. The problem in the prior art that an aluminum electrolysis workshop is large in air refractive index fluctuation and low in laser ranging precision can be solved. The system is high in laser ranging precision, low in manufacturing cost and easy in industrialization.