Water is a resource for human survival, but with the development of economy, the lack of fresh water resources, industrial radioactive sewage discharge and other problems have a huge impact on the water environment. Due to the high cost of traditional purification, there is an urgent need for an energy-saving and low-cost water purification method. To this end, the team provides a solution of intelligent light focusing, non-contact membrane distillation combined with solar power generation, and designs a water purification device based on membrane distillation and solar electric heating, which has the advantages of energy saving, environmental protection, efficient treatment, compact structure and high water efficiency. The main process is as follows: solar energy is stored in the battery through the solar power panel to supply power to the water supply pump, fan, sensor, solenoid valve and light tracking motor in the device. When it works, the water supply pump installed at the bottom of the device sucks in the waste water and stores it in the distillation water storage tank after passing through the condensation heat exchange device. At the same time, the solar collector of the distillation water tank collects solar light and generates a large amount of heat into the copper heat conduction pipe to heat and distill the high temperature box waste water. When the preset working conditions are reached, the fan reverses to form a diversion and reaches the distillation membrane module, and reaches the condenser, condensed into liquid water in a condenser and finally collected into a clean water storage tank. In order to complete the water purification. In addition, in order to facilitate the operation of the device and monitoring the status of the device, our team independently developed the relevant upper computer program and touch-type serial port screen. Users can view the water level in the middle temperature zone and distillation zone in real time, the charging and discharging status of the battery, the battery power, the switch status of the condenser tube water pump valve, the temperature in the middle temperature zone, etc.