PICC waterproof sleeve

The utility model discloses a PICC waterproof sleeve which is applied to a human body where a retention catheter is used. Particularly, the PICC waterproof sleeve comprises a bandage unit which is arranged on the human body in a tied and sleeving mode and covers the retention catheter. A vacuum area is formed between the bandage unit and the human body. A PICC is located in the vacuum area. According to the PICC waterproof sleeve, the vacuum area is formed between the bandage unit and the human body, the PICC is located in the vacuum area, a punctured part of the human body is located in the vacuum area, and the PICC and the punctured part of the human body can not be influenced when a patient cleans the body. The design of a check valve and a negative pressure ball is adopted, and therefore a patient can vacuumize a pipe body of the waterproof sleeve by only one hand, the PICC waterproof sleeve is convenient and rapid to use, and due to the design of the check valve, the phenomenon that the using of the vaccumized pipe body of the waterproof sleeve is influenced when air leakage happens to the vacuumized pipe body of the waterproof sleeve can be prevented.