Soil sampling device for large-depth prefabricated tubular pile core

The utility model belongs to the field of building construction, and particularly relates to a large-depth prefabricated tubular pile core soil sampling device which comprises a machine frame, a base, a pushing mechanism, a lifting driving mechanism and a soil sampling cylinder, the base is of a hoop structure, detachably hooped outside a tubular pile and detachably connected to the lower end of the machine frame, the pushing mechanism is installed on the machine frame in an up-down sliding mode, and the lifting driving mechanism is installed on the lifting driving mechanism. The pushing mechanism is used for pushing away soil, the lifting driving mechanism is installed on the rack in a matched mode and used for driving the pushing mechanism to ascend and descend, and the soil sampling barrel is connected to the lower end of the pushing mechanism and used for sampling soil. The pushing mechanism is driven by the lifting driving mechanism to push soil, and the soil sampling barrel is mounted at the lower end o