The invention aims to provide a fiber, a non-woven fabric containing the fiber, a high temperature resistant filter material containing the non-woven fabric, a filter device containing the filter material, and a preparation method of the products. The fiber provided by the invention is a sulfuryl-containing blending type aromatic polyamide fiber, the fiber comprises 40-98 wt% of aromatic polyamide and 2-60 wt% of polyarylsulfone, and the aromatic polyamide and the polyarylsulfone are blended. The non-woven fabric containing the sulfuryl-containing blending type aromatic polyamide fiber provided by the invention comprises the sulfuryl-containing blending type aromatic polyamide fiber (A) and fluorine-containing fiber (B), wherein the sulfuryl-containing blending type aromatic polyamide fiber (A) comprises 40-98 wt% of the aromatic polyamide and 2-60 wt% of the polyarylsulfone, and the aromatic polyamide and the polyarylsulfone are blended; at least one fluorine atom is contained on more than 90% of main chains or side chains of a chain unit of a fiber-forming polymer of the fluorine-containing fiber (B). The filter material containing the non-woven fabric provided by the invention has good filter efficiency, good high-temperature dimensional stability and high-temperature strength retention rate.