The invention discloses a soil restoration device comprising a rack, a soil conveying system, a crushing box and a stirring device. The crushing box comprises a box body. The box body is internally provided with the crushing device, a feeding inlet is formed in the top of the box body, and a discharging outlet is formed in the bottom of the box body. The conveying terminal of the soil conveying system is located above the feeding inlet of the box body, the discharging outlet of the box body is connected with the stirring device through a conveying device, and the interior of the box body is divided into a crushing cavity, a return cavity and a discharging cavity through partition plates. The crushing device is mounted in the crushing cavity, the bottom of the return cavity communicates with the discharging cavity, the top of the return cavity communicates with the crushing cavity, or the return cavity communicates with the outside world, and the return cavity is internally provided with a return transferring device. According to the soil restoration device, the situation that a restoration agent is put to a large polluted soil block can be avoided, so that the restoration agent issufficiently immersed into polluted soil, and the restoration efficiency is improved accordingly.