We first analyzed the force and motion of naval aircraft during launching process.Further,we investigated the ship deck with the form of a ramp and established deck motion model and ship airwake model.Finally,we conducted simulations at medium sea.Results showed that the effects of deck motion on takeoff varied with initial phases,and airwake could help reducing aircraft′s sinkage.We also found that the deck motion played a major role in the effects caused by the interaction of deck motion and ship airwake. We first analyzed the force and motion of naval aircraft during launching process. Future, we investigated the ship deck with the form of a ramp and established deck motion model and ship air wake model. Finaally, we conducted simulations at medium sea. Results showed that the effects of deck motion on takeoff varied with initial phases, and airwake could help reduce aircraft’s sinkage. We also found that the deck motion played a major role in the effects caused by the interaction of deck motion and ship airwake.