In order to realize accurate calculation of field of view(FOV) overlap between sub eyes of compound eye system, reduce the number of sub eye systems, and make the system miniaturized and lightweight, a FOV overlap calculation model was proposed. Firstly, the relationship between the sum of FOV and the included angle of optical axis was analyzed. Based on the coordinate relationship between the edge points of FOV, a calculation model of FOV overlap rate was established, which was related to the included angle of optical axis, the angle of FOV and the observation distance. Through the analysis of this model, the angle of the optical axis between the sub eyes in the compound eye system should be less than the sum of the field angles of the sub eyes, and greater than the difference of the field angles of the sub eyes; at the observation distance of more than 3 km, the overlap rate of the field of view between the sub eyes tends to be fixed with the observation distance. According to this model, a 19 aperture compound eye system was designed. The experimental results show that the compound eye system can achieve 79.23° full field of view without blind area monitoring. The actual overlap rate of sub eyes between the first level array is 71.16% and 45.99% in the X and Y directions respectively; the actual overlap rates of the sub eyes between the first and second level arrays are 43.00% and 18.36% respectively in the X and Y directions, respectively. The actual overlap rate was 14.62% when there was overlap in direction X, and 66.58% and 24.6% in X direction and Y direction respectively. The theoretical overlaps were 75%, 40%, 40%, 20%, 15%, 70%, 30%, respectively. Through the comparative analysis of the actual overlap and theoretical overlap, the feasibility of the field overlap calculation model is verified.