Restraining structure of motor end cover mounting leg and support column

The invention discloses a restraining structure of a motor end cover mounting leg and a support column. The restraining structure comprises the motor end cover mounting leg and the support column, wherein a concave platform is arranged at an end leg part of the motor end cover mounting leg; a fixed column is arranged on the concave platform; a through hole penetrating through the fixed column and the concave platform is formed in the center of the fixed column; the lower end of the support column is fixedly arranged on an iron core; and the upper end of the support column penetrates out of the through hole, and is tightly locked on the fixed column by a nut. According to the restraining structure of the motor end cover mounting leg and the support column, radial stress of an end cover can be restrained effectively, and the perpendicularity can be restrained under the condition that an area of a contact end face of the motor end cover mounting leg is not increased.