The trend towards miniaturization of aero engines has made the coupling between incoming flow conditions and corner flow in high-pressure compressors more complex., To study the impact of upstream incoming wakes on the leakage flow of cantilevered stators, this study conducts numerical simulations based on a cascade test rig with moving/static endwalls. The high-speed relative motion between the blade tip and the endwall is simulated by setting the endwall's movement speed. Specifically, bars of particular sizes and positions are arranged on the cascade to generate wake flows that match those found in a multi-stage compressor environment. In the research, the steady state impact of the moving endwall on reducing total pressure loss was analyzed. It was found that the coupling effect of the moving endwall and incoming wakes further suppresses the corner flow towards the blade tip. Through vorticity analysis, the coupling effects of the moving endwall and incoming wakes on the position, size, and intensity of the tip leakage vortex were investigated. Under the coupling effect, the leakage vortex moves towards the blade tip and away from the cascade. Meanwhile, the vortex core size decreases, and its stability increases.