As a very important official position in the regime established by the Qidan nationality,Tiyin played a decisive role in the political history of Liao Dynasty.Tiyin,an official position in Liao Dynasty,is also one of the focuses of academic research.In the past,academic circles conducted a lot of research on the group evolution history and institutional setup of Tiyin in Liao Dynasty.On the basis of relevant research results,the author intends to analyze Tiyin's official position from the perspective of Tiyin's post and transfer in Liao Dynasty,so as to further explore the related issues of Tiyin's official position in Liao Dynasty.