The invention discloses a multifunctional trolley of a switch cabinet. The multifunctional trolley comprises a trolley body, three upper contact arms and three lower contact arms, wherein the rear ends of the upper and the lower contact arms are fixed on the inner side of the trolley box respectively; front ends of the upper contact arms are fixedly connected with upper moving contacts respectively; front ends of the lower contact arms are fixedly connected with lower moving contacts; insulation sleeve boxes are sheathed on the front ends of the upper and the lower contact arms respectively; rear ends of the upper and the lower contact arms are internally provided with a sensor respectively; the external side of the trolley body is provided with a live display and an earthing knifeswitch; the inner side of the trolley body is also provided with an earthing bar of which the upside is hinged with one end of the earthing knifeswtich and the downside of the earthing knifeswitch is connected with the trolley body; and when the earthing knifeswitch is switched on, the other end of the earthing knifeswtich is connected with an upper contact arm connection seat. The multifunctional trolley is simple in structure and low in cost and is convenient to maintain and detect. The multifunctional trolley disclosed by the invention integrates the earthing function and the electricity check function and can serve multiple purposes, thus reducing manufacturing cost and avoiding waste caused by the configuration of multiple trolleys.