The reinforced multifunctional cross beam comprises a cross beam body, a charging lamp groove and a wire arrangement groove are formed in the bottom of the cross beam body, the wire arrangement groove is located on one side of the charging lamp groove and communicated with the charging lamp groove, expansion grooves and baffles are formed in the bottoms of the two sides of the cross beam body, and positioning rods penetrate through the tops of the baffles. The two ends of the positioning rod are both provided with positioning rings in a matched mode, and the two positioning rings are both installed on the cross beam body. When the charging lamp is charged, the baffle is connected into the receding groove to avoid influence on the charging head, when the charging head is pulled out after charging is completed, the baffle is popped out of the receding groove through rebounding of the torsional spring to reset, the charging interface continues to be sealed, and the situation that the charging interface is polluted by external environmental factors such as dust and sundries is effectively prevented; the charging terminal is prevented from being blocked or damaged, the reliability of the charging interface is improved, the service life of the charging interface is prolonged, dustproof protection is carried out on the charging interface through automatic reset, a user does not need additional operation, and the charging process is simplified.