The invention discloses a grass conveying system of a chained fixation machine. The grass conveying system mainly comprises chain wheels, conveying chains and grass mowing ratchets. The conveying chains are mounted on the corresponding chain wheels, and disposed on a support according to a certain arrangement form in three groups. Each conveying chain is provided with teeth, and can drive to-be-conveyed grass to move along a designed route. The grass mowing ratchets can separate the grass, adhered to the conveying chains, from the conveying chains. The three groups of conveying chains are different in operational direction, and bales adhered together can be separated effectively for the convenience of conveying.