Natural grassland soil collecting device

The utility model relates to the field of soil collection. The utility model particularly relates to a natural grassland soil collecting device. The device comprises a rocker arm and a rotary pressingmechanism, the rocker arm is fixedly arranged at the top of the rotary pressing mechanism; the rocker arm is in transmission connection with the rotary pressing mechanism; the rotary downward pressing mechanism comprises a downward rotating pipeline, a transmission sleeve and a scale rod; the scale rod can be arranged in the downward rotating pipeline in an up-and-down sliding manner; external threads are formed in the outer edge of the downward rotating pipeline; the inner edge of the transmission sleeve is provided with an internal thread matched with the external thread of the downward-rotating pipeline; a fixing sleeve used for abutting against the ground is fixedly arranged at the bottom of the transmission sleeve. The fixing sleeve and the downward rotating pipeline are coaxially arranged; the inner edge of