The invention relates to a handheld post-toilet washer. The handheld post-toilet washer comprises an upper cover, a base and a scrape head, wherein the base is mounted on the upper cover; a drain pipeand a water outlet I are arranged on the upper cover; a matching bulge ring is arranged on the upper cover; locking grooves are formed in the matching bulge ring; locking bulges are arranged on the scrape head and connected with the matching bulge ring; a drain port is formed in the base; the drain pipe is mounted at the drain port; a button valve is connected with a connecting plastic pipe whichis connected with a connecting head; an external thread port is formed by rear ends of the upper cover and the base through matching; the connecting head is mounted in the external thread port. The handheld post-toilet washer is conveniently used by patients with hemorrhoids, obese people, people with hand and foot moving difficulties as well as old people.