Portable sampler for northern alkaline soil heavy metal pollution

The utility model relates to the technical field of soil sampling, and discloses a portable sampler for northern alkaline soil heavy metal pollution. The limiting mechanism is arranged below the vertical rod; the limiting mechanism comprises a bottom plate, the bottom plate is fixedly mounted at the bottom of the vertical rod, a sampling pipe body is movably mounted at the bottom of the bottom plate, square blocks are fixedly connected to the two sides of the top of the sampling pipe body, and the tops of the square blocks penetrate through the bottom plate. Through the arrangement of the square block, the plug pins, the vertical plates, the round rods and the springs, the two round rods can drive the two vertical plates to move oppositely and compress the springs by pressing the two pressing handles, so that the two plug pins can move oppositely, and when the plug pins are pulled out from the interior of the square block, the limiting effect on the square block and the sampling pipe body is relieved; therefo