Bladder irrigation is one of the simplest ways of chemotherapy for bladder tumors. Firstly, you should choose the drug for bladder irrigation, the most common ones are hydroxycamptothecin, pirarubicin, mitomycin, etc. Dilute mitomycin with 50-60 ml of saline, dilute it and prepare it for use. Then the urethral orifice as well as the foreskin is disinfected, sterile orifice wipes are laid after disinfection, a pre-prepared catheter of F6 or F8 is inserted into the bladder, and after releasing the excess urine, the pre-prepared chemotherapeutic drug is injected into the bladder through the catheter, and then the catheter is removed. Then perfusion is performed in a different position so that perfusion is completed.