The invention provides a ball valve suitable for gas-liquid two-phase flow. The ball valve has the flow adjusting function and comprises a valve body, connecting flanges, a valve element, a flow channel, a valve rod, a switch handle, a fluidization inner core, a fluidization hole, an adjusting rod and a fluidization adjusting handle. The two ends of the valve body are provided with the connecting flanges. The valve element is arranged in the valve body. The flow channel is formed in the valve element. The fluidization inner core is arranged inside the flow channel and provided with the fluidization hole. The upper end of the valve element is provided with the valve rod. The upper end of the valve rod is connected with the switch handle. According to the ball valve, the fluidization inner core is additionally arranged, the fluidization adjusting handle can be used for opening adjustment, the fluidization effect is achieved, gas and liquid are evenly mixed, flow can also be adjusted, and the number of auxiliary elements installed in a gas-liquid two-phase flow pipeline is greatly reduced, so that the assembly and disassembly difficulty is lowered, and the installation and maintenance cost is reduced.