Abstract: A liquid crystal light valve （LCLV） with composite film photoconductor （a-Si:H/nc-Si） was studied in detail. The photoconductor film with the columnar microstructure in which the nanosized crystalline silicon （nc-Si） embedded is deposited through inducing the formation of crystalline silicon by Al sublayer with two typical technologies, i.e. Thermal Evaporation for preparing the Al layer and Plasma Enhanced Chemical Vapor Deposition （PECVD） for depositing the a-Si:H layer. The conducti-vity of the photoconductor keeps anisotropy between the lateral and the normal directions, where it is less in the lateral than that in the normal. The resolution of the LCLV with a-Si:H/nc-Si composite columnar photoconductor reaches about 500 lp/inch.