Embodiment of the invention discloses an empty identifying method, a device and a receiving equipment capable of identifying empty of a MLPPP link, which is used for quickly identifying empty in the MLPPP link and performing packet fragment reassembling. The method comprises generating MLPPP link binding relation configuration parameter list; generating a serial number recording list which records serial numbers of received point-to-point link latest packet fragment; obtaining the serial numbers of latest packet fragment in the serial number recording list through the MLPPP link binding relation configuration parameter list, determining whether the current packet fragment is empty according to logical size relationship of serial number of the latest packet fragment and the current required packet fragment. The invention can quickly determine whether a packet fragment is empty, prevent pointless waiting when meeting an empty, therefore the time delay of the MLPPP link is small, cache resource is saved, and fault-tolerant capability is improved.