Fixing device for computer mainboard production

The invention relates to the technical field of fixing equipment, and discloses a fixing device for computer mainboard production. The fixing device comprises two fixing plates, the opposite sides of the two fixing plates are rotatably connected with a plurality of turntables, and the outer sides of the turntables are sleeved with rotating belts. By arranging a lower fixing frame, a fourth rotating rod, a fourth gear, a third tooth groove and a supporting rod, in this way, when the lower fixing frame moves, the angle of a mainboard needs to be adjusted, a first gear on the rear portion passes through an upper toothed plate on the rear portion, the first gear drives the fourth rotating rod to rotate, the fourth rotating rod drives the fourth gear to rotate in the third tooth groove, and therefore the supporting rod is driven to move upwards, the angle of an upper fixing frame is adjusted, after the procedure is completed, when the rear first gear passes through a rear lower toothed plate, a convex block is pressed into a movable hole by a top block, a pull rope is pressed by the convex block, a clamping block is retracted into a storage groove, then the first gear is in contact with the lower toothed plate, and the first gear drives the fourth rotating rod to rotate to lower the upper fixing frame.