Water accumulating cup device of breathing machine

The utility model provides a water accumulating cup device of a breathing machine. The water accumulating cup device comprises a first water accumulating cup, a pressure switch, a second water accumulating cup and a water level sensor. The lower part of the water accumulating cup I is communicated with the water accumulating cup II; a pressure switch is arranged at the communicating part of the water accumulating cup I and the water accumulating cup II; a water level sensor is arranged on the second water accumulation cup and connected with an alarm of a nurse station to remind a nurse to conduct drainage treatment on accumulated water in the water accumulation cup, the water level sensor can also be directly connected with a water stop switch to control opening and closing of the water stop switch, and after a set water line is reached, the water stop switch is automatically turned on; and the water in the water accumulating cup II is drained into the drainage bag. The utility model has an alarm function, an