The invention discloses a method for monitoring the time setting state of secondary equipment of an intelligent converting station. The method is characterized by comprising the following steps of: (1) arranging a time setting state monitoring module in the secondary equipment; (2) connecting a monitoring device for monitoring the time setting state of the secondary equipment to a GOOSE network where the secondary equipment is positioned, and setting time by using a time source which is the same as that of the secondary equipment; (3) transmitting GOOSE messages with the secondary equipment by using specified GOOSE message data and a retransmission mechanism at specified time intervals; (4) receiving a GOOSE message from a specified multicast address by using the monitoring device, wherein an event time mark in the GOOSE message is taken as the time of the secondary equipment, and the time of the monitoring device at the moment when the GOOSE message is received is taken as standard time; (5) computing the deviation value between the time of the secondary equipment and the standard time; and (6) judging abnormity of the time setting state of the secondary equipment at the moment according to a set time setting accuracy. According to the method, the time setting accuracy of the secondary equipment can be increased.