The invention relates to a multi-direction adjustable assembly of a decorative plate. The multi-direction adjustable assembly comprises connecting pieces and a guide rail which are connected in an adaptive mode, wherein an adjusting hole and a connecting hole are formed in each connecting piece. The multi-direction adjustable assembly comprises a plurality of adjustors and adapter assemblies, the adjustors or the adapter assemblies can be separated from or fixed to the connecting pieces, each adjustor comprises an adjusting rod and a locking piece, each adjusting rod can be arranged in the corresponding adjusting hole in a penetrating mode and can be locked to or separated from the corresponding locking piece, each adapter assembly comprises a positioning rod, and each positioning rod penetrates through the corresponding connecting hole to be connected with the guide rail. The connecting pieces are connected with the curved-surface decorative plate and the guide rail through the multiple detachable adjustors and the adapter assemblies so that the curved-surface decorative plate can also be conveniently adjusted and detached after being fixed; meanwhile, the curved-surface decorative plate can be adjusted in multiple directions through the adjustors, the inclination can also be adjusted through the adjustors, and therefore the spatial posture of the curved-surface decorative plate can be adjusted more conveniently.