The invention discloses a soil sampling device for land pollution detection and a using method thereof. The soil sampling device comprises a supporting base, a handle is fixedly installed in the middle of the front portion of the supporting base, turnover mechanisms are arranged on the two sides of the supporting base correspondingly, and a depth sampling mechanism is arranged in the middle of theinner side of the supporting base; the depth sampling mechanism comprises a sampling cylinder, a fixing piece, a motor, a rotating shaft, spiral blades, a discharging pipe, a connecting piece and a drill bit; and a material receiving mechanism is arranged on one side of the upper part of the supporting base. According to the soil sampling device for land pollution detection, on the one hand, thedevice cost is reduced, the structure is simple; on the other hand, the operation convenience is improved, the use effect is improved. Besides, soil samples with different depths can be conveniently collected, the sample collection effect is greatly improved, the practicability is higher, and in addition, the practicability is higher. In addition, material receiving becomes convenient; the collected samples can be conveniently taken out, and the material receiving barrel is very convenient and rapid to mount and dismount.