To prevent a yarn from entangling, even if the distance between a yarn feeder and an ejector is long, and to prevent the construction from being obstructed by effects such as wind.

This reinforced earth construction method is so constituted that the yarn 4 of the continuous fiber is fed from a bobbin stored in the yarn feeder 3, and the fed-out yarn is ejected from an ejection nozzle 5 of the ejector 6 using high pressure water or compressed air, while sand is carried to the fiber ejection destination, and directly ejected and mixed with the yarn. Props 24 are disposed at appropriate intervals between the yarn feeder 3 and ejection nozzle 5, a rope 32 having guide rings 23 for inserting the yarn is stretched between the props 24, and the yarn 4 is guided between the yarn feeder 3 and the ejection nozzle 5 by the guide rings 23 along the rope 32.