The invention discloses a multifunctional stage advertising vehicle which comprises a chassis frame, wheels, a cab, a carriage, a left lateral plate auxiliary expanding mechanism, a left lateral plate folding mechanism, a LED (Light-Emitting Diode) expanding structure, a vehicle body balancing and stabilizing mechanism, a dressing room structure and the like, wherein the carriage comprises a bottom plate, a front plate, a rear plate, a left lateral plate, a right lateral plate and a top plate; the left lateral plate can be expanded and be abutted with a stage expansion structure; and a LED display mechanism, a LED rotating mechanism and a LED lifting mechanism are arranged on the right lateral plate. The multifunctional stage advertising vehicle disclosed by the invention has various advertising display forms and a flexible and changeable advertising display effect and the stage render effect and the advertising display effect are greatly enhanced; and meanwhile, the advertising vehicle also has the advantages that the multifunctional stage advertising vehicle has simple and ingenious structure, is convenient and rapid to fold and expand, is stable to use and support and has a plurality of advertising display distribution points after being expanded; a main screen can be overturned and lifted; the multifunctional stage advertising vehicle has a good stage stereoscopic effect and is convenient for stage actors to change clothes; and the like.