The invention discloses a damping mounting base of a motor. The damping mounting base comprises a bottom plate and a mounting plate; two mounting bases are arranged on the upper surface of the bottom plate; multiple mounting holes are formed in the two mounting bases, and damping sleeves are arranged in the corresponding mounting holes; a supporting cushion is arranged at the bottom of the interior of each damping sleeve; a telescopic rod is mounted on the upper surface of each supporting cushion; the exterior of each telescopic rod is sleeved with a spring; one mounting plate is arranged above the mounting bases; the mounting plate is connected with the mounting bases through the damping sleeves; the mounting plate comprises three layers, including an outer plate, a foam plate and an inner plate; and fixed holes are formed in the upper surface of the mounting plate. By setting the damping sleeves below the mounting plate of the mounting bases, vibration force generated by the motor can be relieved effectively, thereby solving the problem of severe vibration force in the operation process of the motor and prolonging the service life of the motor and the mounting bases.