The invention relates to a dynamic simulation degradation device and a testing method for evaluating a degradable ureter bracket tube. The device comprises a constant temperature liquid reservoir, an electronic peristaltic pump, a dynamic simulation degradation device and a connecting silica gel tube, wherein the dynamic simulation degradation device comprises a working table, a spraying splitting cabin, a tube body peristaltic device and an accumulation cabin. The invention further discloses the testing method with the device. According to the method, an in-vivo environment with a function of a liquid with constant temperature, concentration and flashing velocity and a function of ureter wall mechanical stress can be really simulated by regulating and controlling parameters, and thus an accurate and reliable result of a degradation experiment in vitro can be obtained. According to the invention, multiple test samples can be tested simultaneously, the testing efficiency is improved, the degradation process and the blocking situation can be observed in real time, and degradation products can be collected for later analysis. The blank of dynamic degradation devices of a degradable ureter bracket tube at present is filled, and an accurate and scientific basis is provided for testing and evaluation on degradation performance in vitro.