The invention discloses a ground-touching display mechanism for the bottom of a supporting leg of a child safety seat. The ground-touching display mechanism comprises a supporting leg inner pipe and is characterized in that a cover body is arranged at the lower end of the supporting leg inner pipe, the lower end of the supporting leg inner pipe is limited in the cover body in the mode of being capable of moving up and down, and an elastic resetting piece is arranged between the supporting inner pipe and the cover body; a supporting leg display piece is further arranged at the lower end of thesupporting inner pipe, and a warning part is arranged at the upper end of the supporting leg display piece; and when the bottom end of the supporting leg inner pipe abuts against the inner bottom of the cover body, the warning part is hidden in the cover body; and when the bottom end of the supporting leg inner pipe does not abut against the inner bottom of the cover body, the warning part is exposed out of the cover body. The ground-touching display mechanism is reasonable in structure and convenient to mount, and has the effect of warning whether mounting is in place or not.