Producing method of wallpaper

The invention relates to a producing method of wallpaper. The producing method includes following steps: (1) unreeling non-woven paper on a printing machine and feeding the non-woven paper into a coating machine; (2) coating a surface of the non-woven paper with a PVC layer through a first PVC foaming slurry material by the coating machine, and performing plastification, foaming and cooling to obtain a foamed semi-product; (3) unreeling the foamed semi-product and feeding the foamed semi-product into a circular screen printing apparatus, printing color and stereo simulative patterns on a surface layer of the foamed semi-product through a second PVC foaming slurry material by the circular screen printing apparatus, drying the foamed semi-product in hot air and cooling the foamed semi-product to obtain a printed semi-product; (4) feeding the printed semi-product into a drying oven for performing temperature-increasing foaming; and (5) feeding a wallpaper semi-product into a cooling roller for cooling the wallpaper semi-product to room temperature with circulating water to obtain the wallpaper. Compared with a method in the prior art, the method is simple in production processes. The two different PVC foaming slurry materials are employed for coating, printing and relatively matched foaming. The wallpaper has a stereoscopic and simulative decorative effect.