Abstract: According to the actual change Law of pulsed nozzle in thn field ,this paper divides its impinge wall into seven typical shapes .measures and analyses the effect of the change in impinge wall shape on pulsed jetting characteristics .and in the meantime ,conducts the erosion test of rock specimen at the same experimental conditions with ordinary nozzle and pulsed nozzles of xven typical shapes of impinge wall .At the end ,this paper arrives at significant conclusions ,which will provide reliable evidence for evaluating the actual life of pulsed nosxle in the field.

Key words: pulsed noszlie, Hydraulic jet, Impinge wall, Impact strength, Rock erosion, Laboratory teat