The　change　and　distribution　rule　of　early　temperature　and　strain　of　concrete　were　examined.　Based　on　these　study,　some　other　researches　are　made　concerning　when　and　where　will　rise　the　concrete　cracks　in　strip　constructions.　It　has　been　shown　that　the　early　tension　strain　of　concrete　has　undergone　three　stages:　i.　e.　sharp　rise,　decline　and　stability.　The　first　stage　ends　when　the　concrete　is　poured　for　36~48　h,　and　the　second　is　for　192~240　h.　The　maximum　tension　strain　of　concrete　starts　when　the　concrete　is　poured　36~72　h;　The　early　temperature　of　concrete　undergone　three　phases:　i.　e.　rise,　decline　and　stability.　The　first　phase　ends　when　the　concrete　is　poured　for　9~12　h,　and　the　second　is　for　264~288　h;　In　the　process　of　temperature　rise,　some　statistical　relationship　can　be　found　among　temperature　of　concrete,　between　temperature　of　concrete　rise　rate　and　the　height.　In　the　process　of　temperature　descending,　the　statistical　relationship　between　temperature　and　time　is　obvious　too.　The　early　age　crack　occur　most　likely　in　the　middle　lower　part　of　the　strip　construction　when　the　concrete　was　poured　for　24~48　h.　A　relatively　accurate　prediction　of　possible　cracking　zone　in　the　early　age　of　concrete　was　tensile　strain　of　early　age,　the　largest　contraction　strain　and　strain　difference　of　the　concrete.