Passive location is an important aspect of impact point locating technology. The double-array location can resolve the weak ranging performance of the traditional single array efficiently. The cross algorithm of double-five-element-square-array structure was investigated, of which range and direction estimating precision analysis was conducted. The experiment shows that the relative range and azimuth estimating error of double-array locating method is less than 2.5%, part of the locating result has reached the level of theoretical analysis, and the range estimating precision is much improved than that of single array.