Surface scribing device for mechanical part machining and using method thereof

The invention discloses a surface scribing device for mechanical part machining and a using method thereof. The surface scribing device comprises a supporting mechanism, wherein a movement adjusting mechanism used for moving the position of a laser head is arranged at the upper end of the supporting mechanism; a rotary fixing mechanism used for fixedly supporting shaft parts is arranged on the lower side of the movement adjusting mechanism; the rotary fixing mechanism is connected with the supporting mechanism; and the movement adjusting mechanism is connected with the supporting mechanism. According to the surface scribing device, plate parts and the shaft parts are supported and limited through the supporting mechanism and the rotary fixing mechanism respectively, so that a longitudinal moving assembly, a transverse moving assembly and an up-down moving assembly of the movement adjusting mechanism move the position of the laser head, and the laser head conducts rapid scribing on the plate parts or the shaft