The light propagation characteristic in a two-dimensional triangle lattice photonic crystal is studied by finite-difference time-domain method. Based on reflection of transverse magnetic (TM) wave, the influences on antireflection characteristics of the photonic crystal resulting from incident angle, wavelength and temperature are systematically studied. The simulation results show that the great residual reflectivity of TM wave can be achieved in wide range of wavelength and incident angle by setting a suitable wave guide width parameter, which demonstrates a good performance in anti-reflection. Moreover, the temperature change has slight impact on anti-reflection, which shows a good stability in temperature drifting.