The invention relates to a non-woven felt decorative plate and a preparation method thereof. The non-woven felt decorative plate is mainly used for partitioning or soft packaging and the like during the decoration of restaurants, singing halls and the like. The non-woven felt decorative plate is formed by compounding non-woven felt (1) and a polyvinyl chloride (PVC) membrane through hot melt adhesive powder (2) and is 8 to 15 millimeters in thickness; the non-woven felt (1) is formed by compounding 3 to 5 layers of non-woven base fabrics in a needling mode; and each layer of non-woven base fabric is formed by compounding 15 to 20 layers of fiber webs in the needling mode. The preparation method comprises the following process steps of: paving webs, needling, rolling, performing lap doubling, needling, performing hot rolling, cutting into sheets and laminating. The non-woven felt decorative plate of the invention can be industrially produced, has low labor cost and material cost, can be directly used for partitioning during the decoration of the restaurants, the singing halls and the like, realizes the partitioning and the soft packaging at one step and has excellent heat-preserving, heat-insulating and sound-absorbing properties.