Main track is an important support part to guarantee the normal operation of plane valve in ship lock.This paper reviews the structures,advantages and disadvantages of common integral track,out-hung veneer track and embedded veneer track in recent decades,analyzes the wear characteristics of mild steel,cast steel,high quality carbon steel,alloy steel and laser cladding layer and other materials which are used as tread of main track,and puts forward improvement measures of optimizing structure of main track and directions of choosing materials of track tread.