An absorbable and unidirectionally compressible intestine-intestine stapler, comprising a first through pipe portion (1) and a second through pipe portion (2). The first through pipe portion (1) can move back and forth relative to the second through pipe portion (2), and the first through pipe portion (1) and the second through pipe portion (2) are inseparable. The first through pipe portion (1) and the second through pipe portion (2) respectively comprises large ends (11, 21) and small ends； the large ends (11, 21) are used for fixing an intestinal canal； and the small end of the second through pipe portion (2) is sheathed into the small end of the first through pipe portion (1). The two large ends (11, 21) are consistent in size； when the first through pipe portion (1) moves relative to the second through pipe portion (2), the two large ends (11, 21) are draw close to each other to achieve an intestine-intestine and end-end anastomosis. The outer sides of circular rings at the ends of the small ends of the first through pipe portion (1) and the second through pipe portion (2) are provided with gradually-expanded elastic horn-shaped openings (4)； when the first through pipe portion (1) closes up or opens relative to the second through pipe portion (2), the elastic horn-shaped openings (4) of the two ends open or are squeezed into the large ends (11, 21) of the first through pipe portion (1) and the second through pipe portion (2). The stapler can make two stapled intestinal canals rest relatively, thereby avoiding adjustments required in other assembling modes.
