First/second gear synchronizer sliding block

The utility model discloses a first/second gear synchronizer sliding block which is characterized in that the first/second gear synchronizer sliding block comprises a sliding block body, a steel ball and a spring, wherein the upper part of the sliding block body is an annular body; two longitudinal racks are arranged on the upper surface of the annular body; a spring hole is formed in the center of the upper surface of the annular body; the steel ball and the spring are arranged in the spring hole; the steel ball is exposed out of the spring hole; the two sides of the steel ball are clamped between the two longitudinal racks; the lower part of the sliding block body is a square body; and the width and the length of the square body are less than those of the annular body. The first/second gear synchronizer sliding block is a steel ball sliding block, can allow gear shift of a synchronizer to be smooth and light when being used on the first/second gear synchronizer, and the linkage performance of the synchroniz