Elastomeric replica surface relief structures were prepared by molding poly(dimethylsiloxane)(PDMS) elastomers on the photo-inscribed surface—relief-gratings of azo polymer film．Then polymide(PI)solution was microcontact printing with the elastomeric PDMS on quartz slides．Good surface-relief-grating structures were formed on the quartz slides．Then the quartz slides covered with surface-relief-grating PI films were assembled to liquid crystal(LC)cell．The transmittance passing through the cell between crossed polarizers changed periodically with a regnlas 90°separation of the rotational angle.The pretilt angle of the cell was found to be 2．8°．The results showed that the PI film with surface—relief-grating structures by micrecontaet printing process has good liquid crystal alignment ability．This alignment method call be considered as potentially useful technology in the future LC display (LCD)industry．