The disclosure provides a method for determining link delay. The method includes: according to a preset frequency division multiple, performing frequency division on a first Local Multi Frame Clock (LMFC) of each data lane obtained by parsing to obtain a second LMFC corresponding to each data lane, and, according to the second LMFC, writing respectively the data of each data lane into a corresponding buffer; and according to a SYSREF signal and a preset LMFC interval, generating a third LMFC, and, according to the third LMFC, reading respectively the data of each data lane from the corresponding buffer. The period of the second LMFC is the same as the period of the third LMFC. The disclosure also provides an apparatus, a communication device and a storage medium for implementing the method.