The invention discloses a three-dimensional laser scanning visible light confirmation method used for steel mill travelling crane scheduling, and carries out three-dimensional identification positionconfirmation. Traditional manual calibration efficiency is low, and a three-dimensional laser scanning system is difficult in carrying out position calibration since laser is invisible. Coaxial visible light equipment is added into a three-dimensional laser scanning device to control a motor to drive the visible light equipment to irradiate identification positions in sequence according to steps which are put forward, the comparison and the fine tuning of a position relationship are carried out by an expert rule which is put forward, and the accurate confirmation of the identification positionis realized. The method effectively improves position identification accuracy, avoids later-period manual regulation brought by an inaccurate position and greatly improves the working efficiency of steel mill travelling crane scheduling. The three-dimensional laser scanning visible light confirmation method used for steel mill travelling crane scheduling mainly comprises a two-dimensional laser scanner (1), a servo rotation motor (2), an absolute value coder (3), a PLC (Programmable Logic Controller) (4), visible laser equipment (5), a camera (6) and an upper computer (7).