The tunability of nonuniform reflection holographic filter is investigated theoretically and experimentally.It is shown that reflection holographic filter has not only high optical density of peak wavelength and narrow half bandwidth,but also very good tunability.The coupling wave theoretical model of uniform medium is compared with the model of nonuniform medium.It is identified that the theoretical results gained by the nonuniform model is more coincident with the experimental results than the results gained by the uniform model.