Abstract: The influence of static magnetic field on the properties of water is studied systematically. From experiment results, it is found that, under the action of static magnetic field, the properties of water such as viscosity, conductivity and contact angels are changed. Viscosity of water decreases with the increase of processed time and the strength of the static magnetic field, and the conductivity of water increases when the time processed by magnetic field increases. Meantime, after processed by 0.40 T magnetic filed for 30 minutes, the contact angels of water on Cu and graphite are decrease about 0.4° and 2.4°, respectively. The essential reason of above phenomena might be that the hydrogen bonding in liquid water is influenced by the static magnetic field.