To solve the problems of low DO  concentration, unbalanced DO distribution in water and high energy consumption of conventional aerators in aquaculture, a DSP-based solar push-flow system was designed in this paper. The system uses TMS320F2812 as the main controller, and through tracking the output power of the photovoltaic array by voltage and current detecting circuit, achieves the switch 
between battery charge and discharge; moreover, maximum power point tracking (MPPT) method was used to assure the maximum power output of PV array. The system was used in a 5-day push flow experiment in a 7m＊5m shallow water area and the DO concentration spatial distribution was compared with that in none push flow situation. The results showed that, in none push flow situation, the DO concentration presented an obvious gradient distribution from the water shore to center area. While after a certain time of push flow, the DO concentration spatial distribution tended to balanced and the concentration improved. The research shows that PV push flow can reduce energy consumption significantly, increase DO concentration, improve the balance of DO spatial distribution and has practical significance to increase aquaculture density and production.