Excrement collecting bin of cat toilet and cat toilet

The utility model discloses a cat toilet excrement collecting bin and a cat toilet, and relates to the technical field of pet supplies, and the cat toilet excrement collecting bin comprises an excrement collecting bin body and a remaining amount detection device; the excrement collecting bin body is provided with a containing cavity; the allowance detection device is used for detecting the allowance in the containing cavity. The remaining amount detection device is used for detecting the remaining amount of the containing cavity in the excrement collecting bin body, so that the excrement collecting bin has the remaining amount detection function. Compared with an existing mode that whether the excrement collecting bin is full or not can only be detected, an owner can conveniently know the remaining amount condition of the containing cavity of the excrement collecting bin body in real time, so that the excrement collecting bin body can be cleaned in advance according to the remaining amount condition, the over