Urethral drainage tube with negative pressure suction ball

The invention relates to the technical field of urethral drainage tubes, in particular to a urethral drainage tube with a negative pressure suction ball, comprising: a tube body, a urine catheter and an air delivery tube are arranged in the tube body, an inflatable balloon I is arranged outside the tube body, and the air delivery tube is communicated with the balloon I to supply air to the balloon I; one end of the urine catheter extends out of the tube body and is provided with a first branch pipe and a second branch pipe, the first branch pipe is used for being connected with a urine bag, and the second branch pipe is used for being connected with a negative pressure ball; a pressure sensor is arranged in the urine catheter, a groove used for reducing friction is formed in the outer side of the tube body, and an auxiliary assembly is arranged on the tube body. The pressure of the urine catheter is known through the pressure sensor, so that whether the urine catheter is blocked by substances or not is known,