In Northern Song dynasty, the sick and elderly of Jin Forces are usually demoted to ShengYuan Forces, which is a rule of the military regulation .The Jin Forces of Northern Song dynasty is made up of Zhubanzhi Forces、Shangsi Forces、Ordinary Forces, etc. How they are demoted is different. The soldiers of Zhubanzhi Forces are rarely demoted as ShengYuan Forces before the three dynasties in Northern Song dynasty.The soldiers of Shangsi Forces are mostly demoted as Daijiashengyuan before the Song Emperor Shenzong’s military reform, but the Daijiashengyuan is gradually banned after the Song Emperor Shenzong＆#39;s military reform .The soldiers of Ordinary Forces are demoted as ShengYuan or XiaoFen.