Abstract: Sustained increases in  general price levels in Eighteenth-century  China  attracted widespread  domestic and foreign  attention。This paper examines the reasons for the price increase,the   policies  adopted  by the  Qing government，and the serious impact of the longterm compounded  inflation  to  the  Qing’s  revenue system.The author exposes  the  great changes underway  in  18th century Chinese society  which only foretold the  Qing’s  decline,just  like  so  many other Chinese  dynasties,but  also represented  an  ancient civilization in decline.