Noninvasive glucometer with high detection precision

The invention discloses a noninvasive glucometer with high detection precision, which comprises a protection box, two side walls of the protection box are both provided with through holes, the side wall of each through hole is internally and fixedly connected with an annular shading cloth, one end of each shading cloth is fixedly connected with an elastic ring, and the other end of each shading cloth is fixedly connected with an elastic sleeve. A telescopic air cylinder is fixedly connected to the upper side wall of the interior of the protection box, a lower pressing plate is fixedly connected to the bottom end of the telescopic air cylinder, first arc-shaped grooves are formed in the two ends of the bottom side wall of the lower pressing plate correspondingly, an abutting device is arranged in each first arc-shaped groove, and a containing plate is fixedly connected to the bottom side wall of the interior of the protection box. The device is reasonable in design and ingenious in conception, not only can pre