In order to study the effects of dimple shape on the tribological behavior of sliding surfaces, the geometric shapes of circular, square and elliptic was selected in this study and investigated by reciprocating frictional experiments. The results indicate that each geometric shape possess a optimum area ratio which can obtain minimum friction coefficient under the condition of fixed dimple area and dimple depth; of all optimum area ratio of each geometric shape, elliptic shows the best result of friction reduction. Compared with the untextured surface, the friction coefficient of elliptic dimple decreased by 26.3% when the test load is 200 N and the rotational speed is 400 r/min. With the load increased, however, the friction reduction weakened significantly, this shows that it is difficult to reduce friction using surface texture under the high test load.