| The emperor will discontinue the ceremony of protocol when a important people dead orsome special events happened. This institution is one of the important reward institutions inancient China. Its generation can trace back to Zhou Dynasty, through the development in LiangHan, Wei Jin and South and North Dynasty, Sui Dynasty. It has appeared an obvious refinementtrend in Tang dynasty. Tang dynasty is the setting period and critical period of development ofthis institution. We can not only find the trend of the protocol discontinuing, but also understandthe change of the society and politics in Tang Dynasty.Form Xian Qin to South and North Dynasty, the protocol discontinuing mainly due to thesolar eclipse, the ancestral temple destroyed, disasters. The protocol discontinuing due to funeralarrangements became a system in Sui Dynasty, and became the main reason of the protocoldiscontinuing in Tang Dynasty. At the same time, the protocol discontinuing mainly due to thesolar eclipse, the ancestral temple destroyed, disaster was preserved. This article throughtstatistical analysis of the implementation of the protocol discontinuing in Tang dynasty, to foundsignificant changes of this institution.such as stringent requirements on qualifications, Decreasein the number of days. The the protocol discontinuing has fixed operational procedures. At last,This article has a comparative study on the protocol discontinuing in Tang Dynasty. Through thecomparison of the protocol discontinuing system before and behind the Tang Dynasty to find thedevelopment of this system in Tang Dynasty and the trend in the behind dynasty. |