Adjustable otology straw

The utility model discloses an adjustable otology suction pipe which comprises a pipe body, one end of a third pipe section is fixedly connected with one end of a pipe head, the other end of the third pipe section is connected to one end of a second pipe section, the other end of the second pipe section is connected to one end of a first pipe section, the other end of the first pipe section is connected with a suction pipe connector, and the second pipe section is a snakelike hose. One end of a screw located in the sleeve is driven by a knob to make contact with the third pipe section, so that the third pipe section is limited and fixed in the sleeve, under the telescopic action of the snakelike hose, the first pipe section relatively slides out or slides in in the sleeve to lengthen or shorten the overall length of the pipe body, and the pipe head makes direct contact with target blood; the suction tube connector is externally connected with an infusion pump, blood enters the tube body, a plurality of ventil