A two-stage zoom array detector scanning infrared optical system was proposed. On the basis of traditional infrared secondary imaging optics, a two-stage zoom front telescope system was added to realize two-stage zoom by moving the zoom group along the optical axis. The zoom group adjusted the distance along the optical axis, and realized the compensation of different working temperature and different object distances. In the middle parallel light path, a galvanometer was introduced, and the galvanometer was used to scan back in the corresponding angle range at a specific frequency, which could compensate for the object movement during the exposure time caused by the rotation of the scanning platform, and keep the image clear and stable during the rotation scanning without any shadow. The system is very compact, and can be widely used in the infrared searching and tracking system.