Classifiable rubbish bag

The invention provides a classifiable rubbish bag which comprises a rubbish bag body. An opening is formed in the rubbish bag body, and a tightening device is arranged on the opening. An isolating layer a and an isolating layer b are arranged in the rubbish bag body, one end of the isolating layer a is fixed with the bottom of the rubbish bag body, and one end of the isolating layer b is fixed with the bottom of the rubbish bag body. The isolating layer a and the isolating layer b are the same as the rubbish bag body in thickness. The tightening device comprises a small hole formed in the opening, an elastic rope is arranged in the small hole in a stringing mode. The classifiable rubbish bag has the advantages of being low in cost, and capable of being used for classifying rubbish.