The invention discloses an in-situ soil remediation device utilizing solar energy and a construction method for the same. The device is spliced by multiple separate assembly units; the part, close to the ground, of the whole device is black; each separate assembly unit comprises enclosed inflation cavities; each inflation cavity is in anchoring connection with the ground; the bottom of each inflation cavity is connected with a black plastic cloth which is laid on the ground and is provided with a grid opening; and the top of each inflation cavity is connected with a transparent plastic cloth which is laid on the ground and is provided with a grind opening. The in-situ soil remediation device can absorb solar energy to the greatest extent, and can heat air in the device. Based on a flue effect in the construction and the Bernoulli's effect formed by horizontal air streams on the top end of the construction, upward air streams are formed in the construction, and upward air streams in shallow soil are driven, so that alternate nonequilibrium state transportation of organic pollutants in the soil is caused, and diffusion of the organic pollutants to soil air is caused; and the solar energy and barometric pressure energy are fully utilized, so that the pollutants in the soil and shallow underground water are effectively removed.