A drainage bag, comprising a drainage bag body (1) and a bag hanging device (2). The drainage bag body (1) consists of a front bag body piece (11) and a rear bag body piece (12)； peripheral edge parts of the front bag body piece (11) and the rear bag body piece (12) are sealed by a bag body edge sealing (13)； a space between the front bag body piece (11) and the rear bag body piece (12) form a drainage bag body cavity (14)； the upper part of the drainage bag body (1) is provided with a drainage bag collar (15)； the middle part of the front bag body piece (11) is fixed to a drainage connector (111) corresponding to a position below the drainage bag collar (15)； a discharging connector (16) is fixed to the lower middle part of the front bag body piece (11)； the bag hanging device (2) comprises a hook plate (21) and a pair of hooks (22)； a hook plate connection strip (211) is formed on the lower part of the hook plate (21) and connected to the drainage bag collar (15)； the hooks (22) are connected to two ends of the hook plate (21). The drainage bag has the advantages that hinge pin seats (212) are provided at rear left and right ends of the hook plate (21)； one end of each of the hooks (22) facing the corresponding hinge pin seat (212) is provided with a hook hinge pin (221) in an extending manner； the hook hinge pins (221) are pivoted to the hinge pin seats (212)； the packaging size and packaging resources are saved, and interference on surroundings is avoided.L'invention concerne un sac de drainage, comprenant un corps de sac de drainage (1) et un dispositif de suspension de sac (2). Le corps de sac de drainage (1) est constitué d'une pièce de corps de sac avant (11) et d'une pièce de corps de sac arrière (12)； des parties de bord périphérique de la pièce de corps de sac avant (11) et de la pièce de corps de sac arrière (12) sont scellées par une fermeture de bord de corps de sac (13)； un espace entre la pièce de corps de sac avant (11) et la pièce de corps de sac a
