The Reynolds number (Re) of the low-pressure turbine blades is low in the cruising state, and the laminar boundary layer of the suction surface is prone to separate from the action of the reverse pressure gradient. The separated laminar boundary layer may undergo transition and reattachment, and form laminar separation bubbles. Both situations will cause a lot of energy loss. Therefore, it is necessary to control the boundary layer of the low-pressure turbine with low Re Number. As a relatively new type of active flow control technology, the sweeping jet oscillator does not require moving parts and can generate high-frequency unsteady excitation at the outlet. With the capability of generating jets with a wide range of speeds and high frequencies and adapting to harsh environments with strong electromagnetic interference and radiation, it is an effective means of boundary layer control. From the results of experiments, we found that when Re is 10000, turbulence is 1.8% and the momentum coefficient controlled by the oscillating jet is 0.95%, the boundary layer can be reattached.