Pipette tip box fixing and loading mechanism

The utility model discloses a fixing and loading mechanism for a pipetting tip box. A limiting plate is arranged in the fixing mechanism, so that the pipetting suction head box is limited front and back; a magnet is utilized to adsorb a magnetic metal block on a side plate in a pipetting suction head box, so that the side plate of the pipetting suction head box is attached to a side plate in a fixing mechanism, and meanwhile, a limiting block penetrates through a limiting hole and is in contact with the hole wall of the limiting hole, so that the pipetting suction head box is limited left and right; when the two ends of a bottom plate in a pipette tip box are close to a bottom plate in a fixing mechanism along a first guide groove and a second guide groove respectively, the two ends of the bottom plate in the pipette tip box are embedded into a first concave part and a groove respectively, the pipette tip box is limited up and down, and meanwhile, the direction consistency when the pipette tip box is put into