The invention discloses a thrust bearing bush for a pedestal bearing. The thrust bearing bush is connected with an external high-pressure oil filler, so that the vibration of the bearing reaches 1.9mm/s and is far lower than the national standard of 2.3mm/s, reformation cost is low and the use reliability of high-speed rotating devices such as a motor is also improved. The structure of the thrustbearing bush comprises an upper thrust bearing bush and a lower thrust bearing bush, wherein oil guiding devices which are not communicated with each other are arranged on the end surfaces of the twothrust bearing bushes; a pair of pressure oil inlets communicated with the oil guiding devices is arranged at the top of the two thrust bearing bushes at the same time; and the pressure oil inlets are connected with an external high pressure oil device through a connecting device.