The steel cold saw measuring device is one of the important component equipment in the cold area of the steel mill.In order to meet the needs of the customers for the length specifications of the rolling parts,the rolling steel is cut and cut.This paper briefly introduces the design of sizing trolley in the production of Panzhihua steel rail and some suggestions in equipment selection.By collecting the technical requirements of the fixed trolley,the main components are determined,and the design and optimization of each component are made in detail.The car can be used with cold saw and actually used in the production of steel rail.Meet the requirements of production line use,the positioning accuracy is high,for readers'reference.