Submarine is a very important force in joint anti-submarine operation. But due to the lack of calculation model for the submarine chasing effect, the veracity of submarine operational research is seriously affected. Establishing a calculation model of the submarine chasing effect is important for simulating the operation against submarine. The paper establishes a searching effect model about submarine to submarine in two different ways (the distance we find the target is longer than the distance of target’s elusion, the distance we find the target is shorter than the distance of target’s elusion ) based on serious research of submarine’s search process and factors which effect search efficiency. It improves the search quality of submarine against submarine and gives the way to guarantee and improve search efficiency based on simulation and analysis of submarine’s search efficiency.