The invention discloses a thermal desorption remediation device for soil remediation. The thermal desorption remediation device for soil remediation comprises a supporting base, a fixed base and a thermal desorption box body, wherein a thermal desorption structure is arranged in the thermal desorption box body, and the thermal desorption structure comprises an inlet, a discharging opening, an internal stirring structure, an inlet sealing structure, an outlet control plate, a filter screen and a gas outlet pipeline; and a box body rotating structure comprises a side supporting rod, a rotating motor, a rotating plate and an end bearing seat. According to the invention, the thermal desorption box body capable of rotating and an internal stirring structure are arranged, so the rotating direction of the thermal desorption box body is opposite to the rotating direction of the internal stirring structure, the speed that soil absorbs heat, dissipates and vaporizes impurities during thermal desorption is increased, and thermal desorption efficiency is improved; and meanwhile, a discharging structure is arranged on the device, so the soil is prevented from being gathered in the thermal desorption box body.