2-dimensional(2-D)asymptotic boundary condition(ABC) of 2-D time.dependent SchrOdinger equation (TDSE)for atoms in an arbitrary polarized laser field is investigated.The condition is obtained bv means of Fourier transformation,and the 2-D TDSE is discretized into a linear canonical equation solved via symplectic algorithm.An arbitrary polarized laser。atom interaction is also investigated.Calculated h讪order harmonic generation(HHG)spectra in good agreement with theoretical results.