The utility model relates to an it pulley liquid splashing preventing device technical field is an it pulley splash guard, and it includes houding baffle and preceding bottom baffle, the houding baffle is including back riser, arc -shaped roof and arc posterior lateral plate, on the top of back riser along fixed mounting have with back riser vertically arc -shaped roof, arc -shaped roof is located the front side of back riser, the right side fixed mounting of back riser have with the arc posterior lateral plate, arc -shaped roof and arc posterior lateral plate fixed mounting are in the same place. The internal and external network physical isolation data exchange device is reasonable and compact in structure, the installation is simple and convenient, can prevent effectively that the liquid of adhesion on the sky pulley from splashing, but also can prevent spouting control head flowing back district to what these liquid collected that day bottom in pulley mounting chamber and passing through liquids surge drum collect day pulley below, thereby the work load of spreading the polypropylence sheet and cleaning relevant equipment has been reduced, effectively avoid the emergence of dangerous accident, the environmental protection standard make whole work progress effective control under requiring, construction speed and effect have greatly been improved.