Abstract: This paper analyzes several pivotal factors that influence the obtaining of wave-control data for liquid crystal phased array. On the basis of the analysis, the phase difference between the desired phase profile and the actual phase profile is computed, and an iterative method is proposed to obtain the wave-control data by changing the reference voltage or the reference phase profile of liquid crystal phased array. The selection of key parameters in the method is discussed, and the effects of the characteristic curve range and initial Gaussian phase are studied by simulations. As the simulation results shown, the method can accurately acquire wave-control data, and the characteristic curve range of liquid crystal is a very important factor in obtaining wave-control data. When the character