Easily positioned guide rail system

The invention relates to an easily positioned guide rail system which comprises a slide rail, wherein racks are arranged on the two sides of the slide rail; a motor is arranged at one end of the slide rail; the motor is connected with a robot mounting base through a motor base; a driving gear is connected with an output end of the motor; the driving gear is matched with the racks; the robot mounting base is driven to slide along the slide rail by the motor; a rotating positioning cylinder is arranged at the other end of the slide rail; a positioning piece is connected with a cylinder rod of the rotating positioning cylinder; after the robot mounting base is driven to a preset position by the motor, the positioning piece is driven to rotate by the rotating positioning cylinder, so that the robot mounting base is tightened by the positioning piece and is rigidly positioned. The easily positioned guide rail system is used for positioning a robot in an automatic carrying system for a coloring technique; the device is simple in structure and reasonable in design; the cylinder is utilized to tighten and position, so that the positioning for the robot can be accurately, quickly and efficiently realized.