The invention discloses an internal type bladder irrigation chemotherapy pump, which comprises a chemotherapy pump elastic medicine storage bag, wherein an administration soft hose, which communicates with the chemotherapy pump elastic medicine storage bag, is arranged at one end of the chemotherapy pump elastic medicine storage bag; the end, away from the chemotherapy pump elastic medicine storage bag, of the administration soft hose is provided with an administration hard pipe which communicates with the administration soft hose; a clamp is arranged on the administration hard pipe; an administration pipe, which communicates with the chemotherapy pump elastic medicine storage bag, is arranged at the other end of the chemotherapy pump elastic medicine storage bag; and a valve is arranged on the administration pipe. According to the chemotherapy pump provided by the invention, medicines can be continuously applied to mucosa of a pathologically changed bladder wall through drop irrigation; the chemotherapy pump is fixed to the bladder mucosa by virtue of the clamp, and the medicines, which is applied through drop irrigation in a pipeline, can be siphoned and spread to surrounding bladder walls at the first time through the bladder mucosa, and finally the medicines can be siphoned and spread to the entire bladder wall; then, the medicines are mixed with urine, so that dilution of the medicines, before getting into contact with the bladder wall, is greatly relieved; an administration position is relatively precise; and the medicines, which are continuously discharged through drop irrigation, has a sufficient time to get into contact with the bladder wall, so that a recurrence rate of normuscle invasive bladder cancer which accepts transurethral resection of bladder tumor is reduced.