At first, the military requirements of shipborne laser passive reconnaissance and location technology are summarized. And then, the technical characteristics of laser sources in sea battlefield are analyzed. The principle of passive direction finding cross-locating is introduced and the simulation model is established. The simulation calculation of measurement subset (φ1, ε1, φ2) is performed to obtain laser passive location distance and error data, the correlation information of location distance, single station direction finding accuracy, baseline length and station distribution strategy. At last, the applications of laser passive location engineering are put forward, which has better guidance for the engineering realization of the shipborne laser passive reconnaissance and location.