Optical pure quinazoline compounds, especially compounds of the general formula (I), wherein R1 and Y are defined as the specification, preparation methods of them, pharmaceutical compositions containing them and their uses are provided. Compounds of the general formula (VII), which are intermediates in the synthesis of the compounds of the general formula (I), wherein Ar, R2, R3, m, n, T and carbon atom with * are defined as the specification, are also provided.