The invention provides a soil body crushing and solidifying device which comprises a cuboid barrel body, and a soil inlet, a crushing gear area, a soil baffle, a rolling roller area, a screen area, apartition door, a stirring area and a soil outlet baffle are sequentially arranged in the cuboid barrel body from top to bottom. A soil body entering from the soil inlet is extruded and crushed by a horizontal gear shaft in the crushing gear area and then falls down; then the soil body falls off after being rolled from a gap between adjacent horizontal rollers in the rolling roller area, and fallsinto the stirring area after passing through the screen area; the stirring area comprises a plurality of stirring blades rotating along a vertical shaft and a plurality of curing agent spraying pipeswhich are arranged on the side wall of the cuboid barrel body; and the curing agent spraying pipes are used for spraying a curing agent to the stirring blades. Through the horizontal gear shaft, thehorizontal roller, the screen and the stirring blades, the waste residue soil is crushed and cured on site to be used as roadbed filler for roadbed filling, the waste residue soil is scientifically and reasonably recycled, resources can be greatly saved, and environmental pollution is reduced.