Abstract: Phytolith plays an important role in the study of paleobotany and paleoenvironment because of its small, high yield, and its ability of antierosion and hightemperature resistant. As a sensitivity zone indicating environmental changing, peat bog has become one heated topic in climatic and environmental research. The significance of phytolith in peat deposit is discussed. It shows that phytolith has its own advantage in paleoevironmental reconstruction of peat bogs, and will be of great help in discriminating the palaeoclimatic change.

Key words: phytolith, pollen analysis, peat deposit, environmental change