Dog excrement automatic reception assembly, excrement device and excrement bag

A dog excrement automatic reception assembly, an excrement device and an excrement bag are provided. The dog excrement automatic reception assembly is capable of being worn on a dog, at least comprising one excrement device and one excrement bag. The excrement device comprises a cushion main body, a curtain and several connection bands. The cushion main body comprises a through hole and a connecting part that is covered by the curtain. One end of the curtain is connectively fixed on one side of the connecting part of the cushion main body, and the other end of the curtain is a free end that is capable of arbitrarily swinging and fixedly connected with a magnetic stripe. A magnetic plate is fixed on a site of the connecting part of the cushion main body relative to the magnetic stripe. The excrement bag capable of being folded in a flat laminated form is assembled on the connecting part of the cushion main body. With the gravity force of the magnetic stripe connected to the curtain which is greater than the ma