The utility model relates to a but battle array face antenna of stabilizing adjustment angle of pitch belongs to the radar antenna every single move and adjusts technical field. It comprises upper back frame, lower back frame, mechanical auto -lock hydraulic rod and a battle array face antenna, and the upper end of lower back frame is placed in to the lower extreme of upper back frame, and its one side is through support A, support B and a round pin axle activity hinge joint, and the opposite side passes through support C to be connected with support D articulated machinery auto -lock hydraulic rod, and mechanical auto -lock hydraulic rod was put up to the upper back makes the upper back put up rotate around the pin roll, battle array face antenna is equipped with admittedly to one side of upper back frame. The utility model discloses since it is articulated through the round pin axle between upper back frame and the lower back frame, under hydraulic motor's effect, make mechanical auto -lock hydraulic rod upwards promote the rotatory constant angle degree of upper back frame through nut and T type screw rod to realize the angle modulation of battle array face antenna, can satisfy that the biggest reentry angle is greater than under 60 the situation and the purpose that antenna gain does not reduce, and can be fine reach mechanical auto -lock effect.