▎ 摘　　要

NOVELTY - The utility model claims a blood sugar detector, comprising a subject, a microneedle, pressing part and electrode, subject to form a cavity in the micro-needle located in the surface of the main body and provided with a tissue fluid flow channel, the hole is extended and connected with the hollow cavity to the subject from the microneedle tip, compressing part is connected with the cavity and capable of discharging the air in the cavity to form the negative pressure environment in the cavity by compression, electrode is set in the cavity, and can contact with the tissue fluid flowing through micro-needles, tissue fluid by detecting glucose concentration, electrode comprises a working electrode. the reference electrode and the auxiliary electrode, working electrode, reference electrode and auxiliary electrode are spaced, wherein the working electrode comprises graphene composite layer, graphene composite layer comprising a 3D graphene layer and loaded on the nano metal particle in the 3D graphene layer. blood sugar detector of this utility model can realize the continuous detection of blood glucose, high precision, good reliability and small wound to the human body, can quickly realize the clinical application.