The utility model provides a shock mitigation system of large capacity stirred tank, its includes power device, power device fixes on a base the below of base is provided with agitating unit, be provided with a damping device on the base, be provided with the 2nd damping device between base and the agitating unit, the last velometer that still is provided with of power device, the utility model discloses add damping device owing to appear the bearing part position of vibrations easily at agitating unit, utilize the problem of the effectual solution agitating unit vibrations of triangle -shaped stability principle, reduced the damage at bolt position simultaneously, prolonged the life of equipment, moreover the utility model discloses an automatic reagent feeding agent has lightened operation workman's work burden, is particularly useful for equipment and is in open -airly and the circumstances of inconvenient maintenance, has satisfied the needs of enterprise's production, possesses very high spreading value.