The self-adjusting dimension grass grid sand barrier laying machine is a treatment machine for the increasingly serious "cancer of the earth"-grassland desertification. It lays a 1*1m grass grid on the surface of the sand layer, uses wheat straw, rice straw, reed and other materials, and sets a grid-like wind barrier on the mobile sand dunes to increase the roughness of the sand surface, which can reduce wind force and make it unable to carry away loose sand particles, while playing the role of windbreak and sand fixation, it can also intercept precipitation, which is conducive to the survival of sand-fixing plants and play an effective role in windbreak and sand fixation. Grass grid sand barrier laying machine is composed of lifting and ditching mechanism, vertical grass laying mechanism, lifting and pressing grass mechanism, lifting and lowering ridge edge mechanism, walking and organization mechanism. It has strong environmental adaptability, stable motion control and friendly human-computer interaction experience. It can not only better meet the current needs of effective desertification control, but also replace the previous "human sea tactics" with mechanized operations, improving sand control efficiency and liberating manpower, moreover, the cost is lower, the effect is better, energy saving and environmental protection, which fundamentally solves the problem that the speed of desertification is faster than that of artificial sand control.