Quantitative sampling device for cosmetic detection

The quantitative sampling device comprises a cylinder body and a rod body, a hollow sampling cavity is arranged in the cylinder body, the rod body is movably arranged in the sampling cavity, one end of the sampling cavity is provided with a sampling opening, and the other end of the sampling cavity is provided with a sampling hole. One end, close to the sampling opening, of the rod body is provided with an end socket which can be matched with the sampling opening to close or open the sampling opening, the rod body is sleeved with a piston, the piston is arranged in the sampling cavity in a sliding mode, a piston through hole is formed in the piston, and the piston through hole is communicated with the end socket. According to the utility model, the movable piston is arranged on the rod body, the size of the sampling cavity can be adjusted by adjusting the position of the piston, so that a proper sampling amount is adjusted, quantitative sampling is realized, the end socket is arranged to be matched with the s