关键词: 日全食, 日冕, 形态结构, 太阳活动

Abstract: The total solar eclipse is the best opportunity to observe the solar corona on the ground. Magnificent solar corona shows very complex morphological structures and active phenomenon. The solar corona gives out strong ultraviolet and Xray，its matter with high temperature outflows continuously to form the solar wind. It  often occurs with violent events of the coronal mass ejection . Coronal activities influence seriously on space environment and space weather，especially on spaceflight and the Earth. The observation and research of the solar corona becomes current hot field with important significance.

Key words: total solar eclipse , solar corona, shape-structure, solar activity