Abstract: This paper has considered several main characteristics: (including cracking distribution mode, occurrence time: temperature procedure, cracking space small and more horizontal cracking of the early strengthened concrete of YunFeng slotted gravity dam overflow surface). And has analyzed complexly sliding shuttering technique, temperature and drying shrinkage stress, concrete design and concrete restraint influence factors etc, hence has presented improved construction method concrete curing measure, conrete additive adjustment engineering measures etc. Two months after concrete pouring, through the total quality inspect at 36~# dam section showed that cracking on the spillway surface had been controlled.?