The lining Materials of aluminium reduction cells are very important.The properties of lining Materi-als are important to the heat losses of aluminium reduction cells.Their thermal conductivity is one of important dates calculated heat balance.There are many means to determine thermal conductivity.This experiment de-signs the measuring installation on the basic of YB/T059-91[1]and primary equipment in the lab.And the au-thor measures and analyses thermal conductivity of lining-fabricating in aluminium reduction cells.