Four-layer terry towel fabric and preparation method thereof

The invention discloses a four-layer terry towel fabric and a preparation method thereof. Ground warps are divided into four groups, the four groups of ground warps are circularly arranged in the warp direction in sequence, the first group of ground warps in the four groups of ground warps and weft yarns are subjected to terry weaving according to the combination of long beating-up and short beating-up to form a first looped pile layer; the second, third and fourth group of ground warps in the four groups of ground warps are sequentially interwoven with weft yarns according to the warp-wise circularly arranged sequence to form a second plain cloth structure, a third plain cloth structure and a fourth plain cloth structure; the second plain cloth structure, the third plain cloth structure and the fourth plain cloth structure are connected with interweaving structural points of the ground warps in different groups through the weft yarns, and then desizing, boiling-off, bleaching, softening, loose drying and hig