The invention relates to a bispecific monoclonai antibody capable of simultaneously recognizing imidacloprid and parathion-methyl pesticides, and a preparation method thereof, belonging to the field of biological technology. The bispecific monoclonai antibody FQ-D6 which can be stably secreted and simultaneously resist imidacloprid and parathion-methyl pesticides is prepared by fusing hybridoma cell capable of secreting anti-parathion-methyl monoclonal antibody and an imidacloprid antigen-immunized rat splenocyte cell through a hydridizatio-hybridoma technique. Proved by effectiveness verification, the antibody can be used for fast and sensitively detecting residuals of the parathion-methyl and the imidacloprid in agricultural production environment and agricultural products. The preparation technology of the bispecific monoclonai antibody capable of simultaneously resisting imidacloprid and parathion-methyl pesticides is simple, convenient and feasible, the whole preparation process of the antibody is not required for special instruments and equipment, thereby being easy for factorization scale production.