A fuel pressure regulator and fuel filter assembly includes: a housing, having a connecting end having a fuel channel; a filter element, located in an accommodating cavity of the housing; a cover plate, located at a second end of the housing; a rear cover, having one end being an opening end and another end being a spring seat, and a sidewall, the opening end being connected to the housing; a spring, a first end thereof being pressed against the spring seat; a seal arranged in the rear cover, a second end of the spring being pressed against the seal; and a fixing ring that fixes the rear cover to the connecting end of the housing, the fixing ring being welded by laser to the connecting end. When fuel pressure is no greater than a spring preload, the seal closes the fuel channel.