Abstract: The main function of an adaptive optics correction system is to correct for wavefront distortion and compensate for wavefront distortion of incident light. In order to measure the wavefront error of the adaptive optics system, a wavefront detection device with a working wavelength of 1 030 nm was developed using non-spherical technology. The device could detect the wavefront of a large-size near-infrared rectangular beam with a clear aperture of 200 mm×80 mm, and the center field of view of the system had a PV value of 0.123 λ and an RMS value of 0.036 1 λ, which indicated the imaging quality was good. Based on the optical design, the structural design of the device was completed and the device was assembled and tested in the laboratory environment. The test results show that the optical and mechanical parameters of the device meet the design specifications and can complete the wavefront detection task of the adaptive optics system.