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This invention relates to the field of soil pollution remediation technology, specifically to a soil pollution remediation device and method. The device includes a mobile frame with a remediation box at its lower end. The remediation box comprises, from top to bottom, an upper cover, a box body, and a base. The box body has an integrally formed internal toothed ring inside. The lower end of the base has a spiral groove with a rotating slot inside. The upper end of the base has a rotating ring groove with a rotating ring embedded in it. The lower end of the base has an integrally formed shielding part. The remediation box is equipped with a remediation mechanism. This invention utilizes the base, spiral groove, and shielding part, combined with the remediation mechanism and spraying components, to achieve static, closed-loop soil tillage remediation. This avoids the shortcomings of mobile tillage remediation, prevents waste and hazards caused by the atomization and exposure of the remediation agent, ensures the remediation agent fully penetrates the soil, and improves the efficiency of soil pollution remediation, thus possessing practicality.