The invention discloses a molecularly imprinted electrochemical sensor for CYR trace rapid detection. The molecularly imprinted electrochemical sensor for the CYR trace rapid detection comprises a working electrode, a reference electrode and a counter electrode; the working electrode is a glassy carbon electrode, and modified by using monodispersed SiO2@TiO2 core-shell nanoparticles firstly, and then a surface molecularly imprinted membrane is further prepared for realizing specific recognition of CYR by using a in-situ electrochemical polymerization method and sol-gel method. The molecularly imprinted electrochemical sensor has strong selectivity and high sensitivity for CYR, and is simple in sample pretreatment steps, rapid and simple in method and satisfactory in detection results of actual vegetable samples. The molecularly imprinted electrochemical sensor prepared by the invention is successfully applied to detection of CYR in cucumbers, mushrooms, Chinese chives and celery, and further good all in sensitivity, accuracy, precision and selectivity.