Anti-stain absorption pad for underpants and underpants comprising the same

An anti-stain absorption pad for underpants, comprising:

• a waterproof layer comprising a main body and two inverse-folded parts, wherein the main body includes a first surface and a second surface, the two inverse-folded parts are respectively provided at two opposite sides of the main body, and each of the two inverse-folded parts includes a third surface and a fourth surface;
• at least one absorption layer comprising a first absorption surface and a second absorption surface, wherein the at least one absorption layer is disposed on the main body, the first absorption surface is arranged on the second surface of the waterproof layer, the third surfaces of the two inverse-folded parts are arranged on the second absorption surface, and the at least one absorption layer is used for absorbing a liquid;
• and
• two fixing structures, which are respectively disposed at the two inverse-folded parts, and fix the two inverse-folded parts on the at least one absorption layer.