The utility model discloses an antenna secondary surface electric adjustment device, which comprises a connecting ball head connected with a connecting flange of the secondary surface, and is characterized in that the connecting ball head is connected with a positioning block through a connecting screw rod, the positioning block is connected with a sliding bock, a lead screw is inserted in the middle part of the sliding block, one end of the lead screw is connected with an output shaft of a servo motor through a coupling, the other end of the lead screw is connected with a lower baffle plate, the bottom part of the servo motor is provided with an upper baffle plate, the upper baffle plate and the lower baffle plate are provided with guide columns therebetween, and the guide columns are connected with guide wheels arranged on the sliding block. The antenna secondary surface electric adjustment device not only has the advantages of simple structure and convenient installation, but also has the advantages of ingenious design, safety, reliability, ability of carrying out adjustment on the antenna secondary surface through driving of the motor, flexibility, ability of greatly reducing the adjustment time and improving the work efficiency and the like.