A solar seawater desalination and power generation device belongs to the technical field of water treatment, and adopts a technical scheme as follows: the device comprises a condensation type solar cooker, a distillation tank, a condenser and a fresh water barrel, wherein the distillation tank is located at the focus of the solar cooker and connected with the solar cooker through a support, a water inlet and a steam outlet are arranged at the top of the distillation tank, and a brine outlet provided with a brine discharge solenoid valve is arranged at the bottom of the distillation tank; the condenser comprises a sealed casing and a condensing pipe installed inside the sealed casing, a water inlet of the sealed casing is connected with a water pump, a water outlet of the sealed casing is connected with the water inlet of the distillation tank, one end of the condensing pipe is connected with the steam outlet of the distillation tank through a steam conduit, and condensate water discharged from the other end of the condensing pipe flows into the fresh water barrel through a water pipe. According to the device, the renewable solar energy is taken as a main energy source, so that the consumption of non-renewable energy resources is saved, the seawater desalination cost is reduced, the environmental pollution is also reduced, and the general trend toward the development of low-carbon economy and environmental protection can be adapted.