The invention provides a circuit breaker detection device which comprises an image acquisition device, a bracket and a computer, wherein the image acquisition device is arranged on the bracket; the image acquisition device is in communication connection with the computer; the image acquisition device is placed on one side of a circuit breaker; a mark is arranged on a transmission connecting rod ofthe circuit breaker; the image acquisition device collects an image of the mark on the transmission connecting rod during the operation of the circuit breaker; a first photo group is obtained and sent to the computer; and the first photo group comprises at least two photos; and the computer determines the image displacement of the mark through the image of the mark, determines the actual displacement of the mark according to the image displacement of the mark, and generates breaker performance detection data according to the actual displacement. By collecting the image of operating of the circuit breaker and generating the detection data, the problem of difficulty in installing a stroke sensor on the circuit breaker is solved, and the performance of the circuit breaker is conveniently detected.