The present disclosure relates to a method and device for reporting a beam failure of a secondary cell (SCell) and a storage medium. The method includes: determining, by user equipment (UE), that a first SCell has a beam failure; determining a target serving cell for transmitting a report message to a base station, the report message being configured to notify the base station that the first SCell has the beam failure; and transmitting the report message in the target serving cell. According to the embodiments of the present disclosure, the beam failure of the SCell of the UE is reported.