The invention provides a circuit breaker fault analysis method and device based on circuit breaker contact movement speed. The method comprises the following steps of acquiring a contact movement image of the circuit breaker in the opening and closing process; acquiring the movement speed of the contact of the circuit breaker at each moment in the opening and closing process according to the movement image, and recording the movement speed as an actual speed; comparing the actual speed of the contact at each moment in the opening and closing process with the pre-stored standard speed of the contact at each moment in the opening and closing process; judging whether the moment that the difference of the actual speed and the standard speed is greater than a preset value is existent or not, and recording the moment as a fault moment; if the moment that the difference of the actual speed and the standard speed is greater than the preset value is existent, outputting first prompt information, and improving the reliability and accuracy of the circuit breaker fault judgment.