The utility belongs to the field of the non-beam pumping unit, specifically relating to a non-beam pumping unit driven by a motor reduction unit. The non-beam pumping unit driven by a motor reduction unit comprises a base, a tower body and a drive mechanism. The drive mechanism is mounted on the platform, comprising a motor reduction unit, a large roller, a small roller, a belt and a counterweight device. The motor reduction unit drives the large roller to rotate by a coupling, and one end of the belt is connected with a beam hanger and the other end hangs down after wrapping around the large roller and the small roller from the upper side and then connected with the counterweight device. The motor reduction unit is composed of a motor and a planetary gear reducer in series.