The present invention discloses a multi-gap and self-adaption rolling-type sand-protecting barrier laying device. The device comprises three parts of a rolling part, a multi-gap adjustable part and a buffer part. The rolling part comprises cutter discs, flange plates and sliding bearings. The multi-gap adjustable part comprises a main framework, cutter disc supports, a rotating shaft and rotating shaft sleeves. The buffer part comprises limiting blocks, compressed springs and locking bolts. In a sand-protecting barrier laying process, the cutter discs only roll for laying; an initial gap of two adjacent cutter discs is one meter, thereby realizing laying of a one-meter-wide sand-protecting barrier; and by sliding the cutter disc supports, the cutter disc supports can horizontally move, and thus laying of 1.3-meter and 1.5-meter sand-protecting barriers is realized. In spite of bumpiness of sand lands in the laying process, displacement is adjustable through extension and retraction of the compressed springs, and thus self-adaption of the laying device on sandy roads is enhanced.