A　restrained　ring　setup　with　a　clapboard　was　developed.　Because　the　clapboard　can　cause　a　stress　concentration　of　concrete　annulus　placed　in　the　ring　setup,　a　crack　of　the　concrete　annulus　can　rise　at　the　tip　of　the　clapboard　at　an　early　age　of　curing.　Then　the　time-span　of　the　evaluation　of　concrete　cracking　behavior　is　shortened.　The　new　evaluation　method　can　avoid　the　disadvantages　of　applying　the　conventinal　restrained　ring　setup　without　a　clapboard　when　evaluating　the　cracking　resistant　behavior　of　concrete,　such　as　the　longer　time-span,　randomicity　and　chanciness　of　concrete　cracking.　Based　on　experimental　data,　in　which　the　effect　of　polypropylene　fiber　and　expansive　agent　on　the　cracking　resistant　behavior　of　concrete　was　investigated,　the　cracking　age　of　concrete　loops　and　the　ratio　of　tensile　strength　to　compressive　strength　of　concrete　were　obtained,　and　the　validity　of　the　proposed　ring　setup　has　been　verified.