The invention belongs to the technology of the automobile electric power steering gear, which relates to the improvement of a connection structure for a torque sensor toothed ring assembly and a sensing assembly used for the automobile electric power steering gear. The connection structure comprises a toothed ring assembly (1), two conduction sheets (2) and a circuit board (4) with two Hall elements. The connection structure is characterized in that the sensing assembly consists of an injection molding shell (3), the circuit board (4) and a bolt (5); the injection molding shell (3) is an injection molding piece embedded with two conduction sheets (2); a circular-arc hoop (6) is arranged inside an annular slot (1a) of the toothed ring assembly (1); and two lugs (6a) are respectively fixed on the left surface and the right surface of the injection molding shell (3) by hoop fastening bolts (7). The connection structure for the torque sensor toothed ring assembly and the sensing assembly has the advantages of simple structure, small processing difficulty, low cost and convenience in disassembling, and the two conduction sheets are high in position precision so as to guarantee the performance of the torque sensor.