Drilling sampling device

The invention relates to the field of drilling sampling, in particular to a drilling sampling device. The device comprises a transmission shaft, an inner cutter turntable and an outer cutter turntable, the inner cutter turntable and the outer cutter turntable are connected to the lower end of the transmission shaft through a transmission device after being buckled up and down, and the transmission device enables the inner cutter turntable and the outer cutter turntable to synchronously rotate along with the transmission shaft and rotate relative to the transmission shaft; an inner fixed cutter and an inner movable cutter are arranged on the inner cutter rotating disc, an outer fixed cutter and an outer movable cutter are arranged on the outer cutter rotating disc, and the inner movable cutter and the outer movable cutter can move in the radial direction of the inner cutter rotating disc and the radial direction of the outer cutter rotating disc respectively. In the initial state, the inner fixed cutter and th