The invention relates to the technical field of water treatment, and particularly discloses a solar water purification device, comprising a pontoon and a bracket disposed on the top of the pontoon, the bracket is provided with a solar panel, the pontoon can float on a water surface, the lateral side of the bracket is connected with a tilting mechanism inclined toward the plane of the pontoon, thesurface of the tilting mechanism is coated with a coating, the top of the pontoon is equipped with a water pump, the water pump is connected to a water pump inlet pipe and a water pump outlet pipe, the water pump inlet pipe extends through the pontoon into a water body, and the water pump outlet pipe extends upward along the bracket, the outlet of the water pump outlet pipe is higher than a connection position, on the side of the bracket, of the tilting mechanism, and the water pump is electrically connected to the solar panel. The solar water purification device provided by the invention caneffectively dissolve pollutant components in the water body, simultaneously complete oxygenation and purification of the water body, improve the water quality of the water body, and has the advantagesof simple structure, compact design and convenient installation and maintenance.