The invention provides a centrifugal switch and a brushless liquid-resistance motor starter comprising the same. The brushless liquid-resistance motor starter centrifugal switch comprises a static electrode and a moving electrode, wherein the static electrode is fixedly arranged on a motor starter liquid storage box shell body; the moving electrode is arranged on an elastic mechanism; the moving electrode is attached to the static electrode under the action of a centrifugal force when a motor is started; the elastic mechanism comprises a guide rod, a linkage block sleeving the guide rod and a pressing spring through which the moving electrode and the static electrode are separated from each other for resetting; and the distance from a center line of an annular groove in the guide rod to a jackscrew arranged in the radial direction of the guide rod, the distance from the spring to a center line of a steel ball and the distance between the moving electrode and the static electrode when the motor is not started are equal. According to the centrifugal switch, electric arc cannot be generated since a gap is not formed between moving electrode and the static electrode when the moving electrode is completely attached to the static electrode, thereby reducing damage to the electrodes.