Roller furnace bottom and furnace roll installation for taking activity cylindrical pin roll positioning method, realize the roll seat without gasket quickly find is installed, can maximize the adjustment of the furnace roller hearth roller quality, accelerate the construction schedule and shortening the time limit for a project, improve the labor productivity.Annealing furnace production line according to the production process can be divided into: preheating section, heating zone, soaking zone, slow cooling section, fast cooling section, the aging period, final cooling section, quenching tank, dryer section, in each segment, has all the features to install the equipment and process piping, see even 1450 annealing furnace 1 shown in general arrangement plan.Furnace roller number up to 280, all parts and components, each roller bearings, bearing box, expansion joint, side cover mouth sealed box furnace roller and the furnace roller and so on, as shown in the annealing furnace roller hearth roller cylindrical pin activities bearing shown in figure 3, figure 2, furnace roll installation, assembly, all the parts in the construction field installation.