A retractable universal wheel draw-bar box comprises a box body and universal wheels, a mounting base is arranged at the bottom of the box body, symmetrical supporting legs and clamping grooves are arranged on the two sides of the bottom face of the mounting base, a containing cavity is formed between the supporting legs in the length direction of the mounting base, and clamping pins are arranged on the mounting base on the outer side of the containing cavity, deflection plates are arranged between the supporting legs in the width direction of the installation base, one side edge of each deflection plate is rotationally connected with the corresponding supporting leg, the two ends of the other side edge of each deflection plate are clamped with the clamping pins, the universal wheels are perpendicularly installed in the middle of the surface of one side of each deflection plate and matched with the containing cavity, and symmetrical elastic clamping jaws are arranged on the surface of the other side of each deflection plate and matched with the clamping grooves, the deflection plates rotate around the supporting feet, the universal wheels are fed into or rotated out of the containing cavities, the elastic clamping pins and the elastic clamping jaws are used for fixing, the box body is convenient to move, meanwhile, the size of the box body is reduced, the box body is convenient to place in a centralized mode, space is saved, potential safety hazards are reduced, and the trolley case can be used in different scenes.