The invention discloses a method for detecting an organophosphorus pesticide by utilizing an MOFs@QDs material in a farmland environment. The method comprises the following steps of adding materials of 4-carboxyl phenyl benzene, zirconium chloride and benzoic acid into dimethylformamide and water, carrying out ultrasonic mixing, reacting in a reaction kettle, washing after naturally cooling, washing with methanol, and drying overnight to obtain a Zr-MOFs material, dissolving in water, ultrasonically mixing uniformly, adding quantum dots, mixing, ultrasonically centrifuging, washing and dryingto obtain a Zr-MOFs@QDs sensor, diluting the Zr-MOFs@QDs sensor with PBS, adding the organophosphorus pesticide, uniformly mixing, and detecting the fluorescence intensity in a microwell plate detector. With the method, the pesticide residue can be rapidly detected with high sensitivity, the good selective detection ability on parathion-methyl and parathion is provided, the detection limit is wideand is 0.005-2 mg / L, the detection efficiency is improved, and the application is wide.