The utility model discloses a disposable anesthesia and breathing circuit, its technical scheme main points are including main loop pipe, main loop pipe one end is passed through the connecting pipe and is connected with the breathing machine, and the respirator is connected to the other end, main loop pipe is single root canal, be equipped with well film separating in the main loop pipe, well film separating closely laminates with main loop pipe and divides into the bellows air inlet pipeline and give vent to anger the pipeline. Anesthesia and breathing circuit that this kind of disposable anesthesia and breathing circuit utilized single root canal to form, occupation space is little, vacates the operating space that more has more for the doctor, main loop pipe is lightly easy -to -use, can not produce the distortion and the pipeline winding of pipeline, the carbon dioxide that the pipeline of giving vent to anger discharged is the effect that the interior gas of air inlet pipeline played the heating, has improved patient's comfort level.