The invention discloses a method, a device and a storage medium for realizing a precise time protocol synchronization message, including recording the message time, identifying a PTP message, and judging whether it is a one-step Sync message; in the receiving direction, modifying and correcting the one-step Sync message For the processing of the field field, when modifying the new correction field new correctionField, read the timestamp recorded in the OriginTimestamp field; in the sending direction, process the one-step Sync message, and set the starting timestamp OriginTimestamp as the departure timestamp. In the present invention, the PHY records the incoming and outgoing time of the message at the MDI, and modifies the correction field and the initial timestamp field of the PTP message while forwarding, so as to realize the one-step mode processing of the Sync message on the TC, and simplify the TC. It avoids the occupation of additional network bandwidth and improves the time accuracy; realizes the modification of one-step Sync message in the physical layer, which not only improves the time accuracy, but also reduces the difficulty of system development and reduces the product cost. Development and maintenance costs.