The Bar Plant of Shandong Laiwu iron &steel company,in development process of grooveless rolling,devised and applied adjustable combined-type sliding Entrance Guide device, repaired and improved the rolling Entrance Guide device,ensured grooveless rolling process of implemented smoothly and Rolling process stability adjustable combined-type sliding Entrance Guide device,inside the cavity dimensions adjustable and Installation dimensions adjustable,adaptability and interoperability strongly,so has higher application value.