Roller support of steel truss

The invention provides a roller support of a steel truss. The roller support of the steel truss comprises a roller. The roller is installed between an upper support and a lower support and the upper support and the lower support are buckled mutually; the upper support comprises a top plate, first baffles are arranged below the front side and the rear side of the top plate, the lower support comprises a bottom plate, second baffles are arranged above the front side and the rear side of the bottom plate, movable grooves located on the same horizontal level are formed in the lower parts of the first baffles and the upper parts of the second baffles, and the two ends of the roller are arranged in the movable grooves of the two sets of the first baffles and the second baffles. According to the roller support of the steel truss, the support is divided into the upper and lower parts between which the roller is installed, and the upper support and the lower support move relative to each other by taking the roller as the basis, to eliminate the deflection, generated by telescopic deformation under the effect of temperature changes or earthquakes, of a steel truss bridge and generated when the steel truss bridge is loaded, the longitudinal displacement change is released, and the structural safety of the steel truss bridge is improved. The roller support of the steel truss can also resist the effect of crosswise horizontal internal force, such as wind load, equipment load and the like.