The invention discloses an output circuit verifying method and equipment of a secondary circuit of transformer substation protection equipment. The verifying method comprises a configuration step, wherein common terminals of a group of multiple grouped circuits are connected in parallel, and the other terminal of each circuit is adopted as a monitoring terminal; a monitoring step, wherein a signal generator is utilized for applying voltage signals to the common terminals, specific signals are added into debugging equipment through a relay protection tester, a junction of each circuit is closed every time, and triggered switching value signals on the monitoring terminals are monitored at the same time; a display step, wherein the triggered switching value signals on the monitoring terminals are adopted as on-off states of the circuits in the group to be displayed on a visible interface in real time in the verifying process. According to the verifying method, the switching value signals of all the monitoring terminals are monitored at the same time, the verifying process can be completed simply by loading the circuits in the group one by one, the verifying work efficiency is greatly improved, the verifying result is visible, and the reliability of the verifying result is improved.