The invention belongs to the technical field of medical trachea cannulas, and particularly relates to a multifunctional double-bag trachea cannula which comprises a tube body, an inner inflation bag and an outer inflation bag. One end of the tube body is a patient end, and the other end of the tube body is a machine end. The side wall of the patient end is provided with an arc-shaped side vent hole indented towards the tube body. The inner inflation bag is formed by connecting a plurality of adjacent concave parts and protruding parts. The outer inflating bag comprises an outwards-protruding first gas bag section, an outwards-protruding second gas bag section, and an arc-shaped connecting section located between and connected with the first gas bag section and the second gas bag section. A flushing and medicine outlet is formed in the portion, above the outer inflation bag, of the tube body. The portions, extending out of the tube body, of an infusion medicine catheter, an outer inflation bag infusion gas catheter and an inner inflation bag infusion gas catheter are fixedly connected side by side. The multifunctional double-bag trachea cannula has the advantages that multi-hole medicine spraying is achieved, tracheal mucosa is not pressed, the blood circulation state is good, glottis is not prone to damage, oxygen supply and sputum aspiration are smooth, and pains of a patient are relieved.