Ostomy bag fixing apparatus

The invention discloses an ostomy bag fixing apparatus. The technical solution main point is as follows: the fixing apparatus comprises a trouser body, wherein the trouser body is provided with cracking ports, and connecting strips connected with two sides of the width of each cracking port, each connecting strip is provided with an adjusting structure which can adjust the width size of each cracking port, the trouser body is detachably connected with pressing fixing parts for pressing and fixing a base disc of the ostomy bag, each pressing fixing part comprises a U-shaped buckle for being pressed on an upper base disc, and a disassembly and assembly part for fixing the U-shaped buckle on the trouser body, each U-shaped buckle is arranged in a U-shaped structure, a first detachable structure, which can make each disassembly and assembly part and the trouser body be connected, is arranged between each disassembly and assembly part and the trouser body, two pressing fixing parts are arranged, a second detachabl