The invention discloses a four-tip leaf line blade based solar stirring oxygenation device. The device comprises a motor, a tank body, stirrer, a variable paddle device, an aerator pipe, solar panelsand a control system, wherein the tank body comprises a water inlet, a water outlet and a baffle. The variable paddle device comprises a servomotor, paddle blades, a draw bar, a turntable, a link anda pushing disc. The motor is placed above a top cover and is connected with the stirrer through a main shaft. The disc turbine type stirrer is employed, and blades are designed according to wing profiles of four-tip leaf lines. The stirrer is connected with the main shaft through key slots, and thus, the height of the stirrer can be conveniently adjusted. The aerator pipe penetrates through the top cover, and a gas inlet is located above the top cover. The solar panels are uniformly arranged on the external wall of the tank body and are connected with storage batteries so as to supply energy to the motor. The control system controls the start or stop of the device and work of the variable paddle device through monitoring the water inlet, i.e., an amount of dissolved oxygen in a water tank.The device is simple in structure and low in operating cost and is applicable to relatively large and relatively shallow ponds.