Abstract: Straw ash, the remains after thermo-chemical progress, is commonly recognized as an increasing economic and environmental burden. With the development of biomass themo-chemical conversion technology, the problem of straw ash utilization becomes more and more obvious. In this paper, the utilization of straw ash in chemical industry, building materials, environmental management and agriculture is discussed. Because of the high SiO₂ content, the straw ash can be made many of chemical products. It can be used in the construction industry, as a promising adsorbent for the removal of various pollutants, especially after chemical and physical activation. It be used as fertilizer in agriculture before and after handling because its basic mineral elements are similar to the earth's crust. Based on the peculiarity of straw ash, the future research in these areas is also discussed.

Key words: straw ash, utilization, absorption, characteristic, thermo-chemical conversion