Anti-overflow protector, collection container and chest drainage device

The utility model provides an anti-overflow protector, a collecting container and a chest drainage device, the collecting container and the anti-overflow protector are independently arranged, and the anti-overflow protector and the collecting container are two independent parts and are in butt joint in a detachable mode. And the collection container is communicated with a negative pressure suction device, a pressure detection device and the like through the anti-overflow protector. In the negative pressure suction mode, the anti-overflow protector arranged in the negative pressure suction channel prevents the liquid from flowing to the negative pressure suction device, and the anti-overflow protector arranged in the pressure detection channel prevents the liquid from flowing to the pressure detection device. When drainage needs to be conducted in a gravity drainage mode, the collecting container can be separated from the main machine and the anti-overflow protector, the collecting container is provided with a