The utility model discloses a direct current 1500V of rail transit power supply system circuit breaker operating characteristic records ripples analytical equipment on line, include: record ripples observing and controlling unit circuit breaker when action, acquire electric current, the voltage disturbance value of circuit breaker, form and record ripples data file, still include server, switch and host computer, the server reads record ripples data file, the host computer passes through switch access server, reads the record ripples data file in the server. The utility model discloses a record ripples observes and controls the separating brake instruction that the unit acquireed the circuit breaker, switching -on instruction, divide position feedback signal, close a feedback signal, when the circuit breaker moves, the current -voltage disturbance value of circuit breaker is acquireed through the direct current changer in the direct current switch cabinet, form record ripples data file, and pass through the server, the switch sends the host computer and advances line display, make the user can in time understand the operating characteristic of circuit breaker, discover the abnormal conditions of circuit breaker as early as possible, be favorable to improving the reliability of rail transit power supply system.