Disclosed is a disposable medical apparatus having anti-excreta backflow and collection function, comprising a medical pants body (1), an excreta collection pocket (2), and a collection plate (3). The medical pants body (1) is a paper diaper of which both the left side and the right side can be opened or closed, and a connection opening (4) is provided on the medical pants body (1)； the excreta collection pocket (2) has an outer layer (5) and an inner layer (6), the outer layer (5) being of a soft non-woven fabric, and the inner layer (6) being a macromolecular absorption layer； the bottom portion of the excreta collection pocket (2) is sealed and the top portion is provided with a pocket opening； the middle of the collection plate (3) is provided with an excreta collection opening (7), and the collection plate (3) is connected to the pocket opening of the excreta collection pocket (2) at one side and is also connected to the connection opening (4) of the medical pants body (1). The medical pants body (1) has two styles, namely, a male style and a female style. The male style medical pants body (1-1) is provided with a connection opening (4) separately at the front side and the back side. The female style medical pants body (1-2) is provided with a connection opening (4) at the back side. The addition of a hygroscopic, removable anti-backflow excreta collection structure to a paper diaper makes the present invention suitable for the discharge and collection of excreta of disabled old people or patients with incontinence.L'invention concerne un appareil médical jetable doté d'une fonction de collecte et anti-retour de selles, comprenant un corps de culotte médicale (1), une poche de collecte de selles (2) et une plaque de collecte (3). Le corps de culotte médicale (1) est une couche en papier dont le côté gauche et le côté droit peuvent être ouverts ou fermés et une ouverture de liaison (4) est ménagée dans le corps de culotte médicale (1)； la poche de collecte de se
