Laboratory solid powder quantitative taking device

The invention relates to a laboratory solid powder quantitative taking device which comprises a reagent bottle, a shell, a sampling assembly and a push rod assembly, wherein a connecting opening matched with the bottle opening of the reagent bottle is formed in the upper part of the shell; the sampling assembly comprises a power part, an inner disc and an outer disc, the inner disc is of a cylindrical structure with grooves evenly formed in the circumferential direction, the outer disc is of a hollow cylindrical structure with a feeding port and a discharging port formed in the side face, theinner disc is arranged in the outer disc in a sleeved mode, and the output end of the power part is connected with the center of the inner disc and used for driving the inner disc to rotate; the pushrod assembly comprises a material storage cavity, a push rod, an elastic piece and a film pressure sensor, the material storage cavity is of a hollow structure with openings formed in the upper end and the lower end, and the o