Automotive column type electric power steering system

The invention discloses an automotive column type electric power steering system, comprising a steering column and a power steering system. The power steering system comprises a motor, a planetary gear reducer, a synchronous belt, a torque/angle sensor, a controller and a shell. Torque is amplified through the planetary gear reducer, input torque is low, output torque is high, transmission efficiency is increased significantly, steering operation of automobiles is more flexible and easier, safety is better, and active return of the steering mechanism can be realized; through connection with the synchronous belt, the problem of abnormal noise during use of the column type electric power steering system in the past is solved effectively; the motor is parallel to the steering column, so that the whole power steering sub-system is small in size, interference is avoided, and installation, detachment and replacement are facilitated; the planetary gear reducer is parallel to the steering column and is installed at t