Seven to eight days. Because of the particularity of cicada's living environment and special living habits, cicadas can walk through the living environment, but they can't fly too high or too far, so their living space is limited. Cicada will not leave their living environment and will not affect their living conditions, so their living environment is limited. Cicada can't eat, its body structure is small, and its life cycle is only 7 to 8 days at the longest.