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In order to improve the guidance precision and the damage effect, the problem of integrated guidance and control design of air-to-ground missile with impact angle constraint was studied. In pitch plane, the integrated model was established by combining the relative motion equation for missile and target with the dynamical equation of missile. Based on the integrated model, an adaptive sliding-mode integrated guidance and control law with terminal impact angle constraint was designed using the methods of playback design, and the system stability was analyzed. The simulation results of the missile with different maneuvering targets demonstrate that the miss distance of missile is less than 1m and the impact angle is closing to -90°,it meets the requirements of the guidance precision and the terminal impact angle constraint.