This article reports the design, production and performance test of an acoustic optic tunable filter (AOTF) with large aperture, which operates at the shortwave infrared spectral band. The tangents of both incident and diffract light vectors at the refractive ellipsoid are approximately parallel. Two plates of piezoelectric transducer are mounted in series on each side of the AO crystal to obtain a wide spectral operating range. The spot shifting problem is solved by designing the light exit surface as an inclined surface utilizing the dispersion relation of the material， and the tuning range of the device 0.9 2.4 μm；aperture 10 mm；spectral resolution 3.5 12.0 nm； diffraction efficiency (20% 40%)/2 W.