The linear slide rail is a kind of transmission guidance, which is the infinite rolling cycle of the steel ball in the raceway of the slider and guide rail, so as to realize the high-precision linear movement of the load platform along the slide rail. Compared with the traditional slide guidance, its friction coefficient can be reduced to the original 1 / 50, and the reduction of starting friction also leads to less ineffective movement, so it can easily complete the high-precision feeding and positioning. In addition The bundle unit structure between the upper sliding block and the guide rail makes it the same as, It can bear loads from up, down, left, right and other directions, and its advantages are beyond the reach of traditional sliding guidance. Therefore, it can form a mechanical working platform with ball screw or gear rack, and finally complete the high-precision, difficult and multi axial mechanical performance of the equipment.