The utility model provides a pressure self -interacting formula burette water dropper, including the water dropper main part, still include, pressure release pipe and rubber separation blade, the stiff end of rubber separation blade install in the inner wall of pressure release pipe, the pressure release end with the inner wall of pressure release pipe formed the water clearance, pressure release pipe with the end screw thread connection of intaking of water dropper main part. The utility model discloses a pressure self -interacting formula burette water dropper through at water dropper main part water inlet installation pressure release pipe, cushions irrigation water in the water pipe through the pressure release pipe, reduces water pressure to the destruction of water dropper main part, improves the life of water dropper main part, reduces the spoilage.