Surface soil sampling device for soil detection

The surface soil sampling device comprises an annular water tank, a square pipe is fixedly connected to the bottom of the annular water tank, a U-shaped handle is fixedly connected to the top of the annular water tank, arc-shaped grooves are formed in the inner walls of the four sides of the square pipe, and the bottoms of the arc-shaped grooves are open. And rotating assemblies are rotationally connected between the inner walls of the two sides of the arc-shaped groove, the bottoms of the four rotating assemblies all extend to the position below the square pipe and are fixedly connected with obliquely-arranged sampling insertion plates, and the sides, close to each other, of every two opposite sampling insertion plates are each of an arc-shaped structure. According to the soil sampling device, during soil sampling, the four sampling insertion plates clamp soil and cut off and separate the soil adhered to the bottom, the phenomenon that the soil cannot be taken out due to the viscosity of the soil when the so