Urethral catheter

The invention discloses a urethral catheter which comprises a catheter body. A hollow negative-pressure ball is arranged on the catheter body and communicated with the catheter body, the catheter body and the negative-pressure ball are prepared from antibacterial polymers comprising, by weight, 1000 parts of silica gel and 1 part of antibacterial agents with carriers and antibacterial components, the antibacterial components are attached onto the carriers, the carriers comprise substances with the mole ratio of Na2O:H2O:R1:R2:R3:SiO2=1:500:3:1:0.5:10, R1 refers to an amine template, R2 refers to a silane compound, and R3 refers to cyclophosphamide monohydrate. By the aid of the negative-pressure ball arranged on the catheter body of the urethral catheter, foreign matters can be discharged through pressure by pressing the negative-pressure ball even if the urethral catheter is blocked in the bladder operation process, so that the foreign matters can be prevented from blocking the urethral catheter. The urethra