The infrared radiation characteristics of the key parts of the ship, such as funnel and power cabin, are studied by using the method of combining the measurement analysis and theoretical calculation of the typical ship, and the geometric model of the typical ship infrared radiation distribution is constructed. The spatial distribution characteristics of infrared radiation area and radiation temperature of typical ship targets are quantitatively extracted by using horizontal projection and grid division methods, and the design of target body simulating the shape and infrared characteristics of typical ship targets is completed. Compared with the real ship, the test results show that the design realizes the realistic evaluation of the simulated target ship.