Current sour water stripping tower suffers usually problem of tray blocking,which leading to high energy consumption and short operation period.This problem cannot be solved by the existing tray technology.This paper puts forward a new type of tray structure (SDMP) with anti-blocking function.The tray's structure and cap layout are optimized by means of CFD simulation technology.Industrial application results prove that SDMP tray has good anti-blocking performance and can significantly extend the operation period of sour water stripping tower.SDMP's tray efficiency keeps stable with the prolonging of operation time and its average tray efficiency is significantly higher than F1 tray.