The invention provides negative-ion anti-formaldehyde ecological wallpaper, comprising a wallpaper substrate, and a surface coating layer compounded on the surface of the wallpaper substrate, wherein the surface coating layer comprises paint, negative-ion powder and a formaldehyde remover. In the negative-ion anti-formaldehyde ecological wallpaper provided by the invention, the formaldehyde remover has the effects of adsorbing, fixing and degrading formaldehyde and has good removal effect for formaldehyde of surrounding environment; and not only does the negative-ion powder have durable negative-ion generation function, far-infrared emission function and good sterilization and bacteriostasis function, but also negative ions relieved by the negative-ion powder have strong redox capacity, can decompose organic gases such as formaldehyde and the like, thereby improving the capability for removing formaldehyde continuously and durably of the formaldehyde remover. Experimental results show that the negative-ion anti-formaldehyde ecological wallpaper provided by the invention can remove formaldehyde in the environment chronically, durably and effectively, purifies indoor air, and is helpful for keeping human health.