The utility model relates to an improve the device of the anti cavitation corrosion performance of common industrial valve, be applicable to any type of industry valve, can directly transform on the basis of original valve pipe way system: the utility model provides an add fluid diffusion pressure boost section between valve and pipeline, have the advantage that improves pipe inner wall behind valve cavitation number, the protective valve, reduces the cavitation corrosion scope concurrently, can effectively improve the anti cavitation corrosion performance of industry valve, reform transform simply, invest in for a short time, overhaul and maintain the convenience.