The invention discloses a motor stator and a manufacture method therefor and belongs to the field of petroleum drilling tool. The motor stator comprises a stator tube body, at least one connecting head and a rubber lining, wherein the at least one connecting head is welded on an end part of the stator tube body, and the rubber lining is injected in the stator tube body and the at least one connecting head in a pressed manner. The method comprises the following steps: after the at least one connecting head is welded on the end part of the stator tube body, the rubber lining is injected in the stator tube body and the at least one connecting head in a pressed manner via a rubber pressure injection device. In the motor stator, the connecting head is welded on the stator tube body, mechanicalstrength of a motor stator steel pipe shell body for a screw rod drilling tool can be ensured, a defect of conventional technologies being unable to repair the motor stator steel pipe shell body can be overcome, the service life of the motor stator steel pipe shell body can be prolonged, production cost of the screw rod drilling tool is lowered, and material waste is reduced.