Data processing method and data processing device

The embodiment of the invention provides a data processing method and a data processing device, which are helpful for reducing the time delay of a receiving end and can adapt to more PMD types at the same time. The method comprises the following steps that z first data streams are decoded respectively to obtain z second data streams, the z first data streams are subjected to forward error correction (FEC) coding, and z is an integer larger than 1. And respectively carrying out deconvolution interleaving on the z second data streams to obtain z third data streams. AM locking is carried out on the z third data streams according to a second AM set to obtain z fourth data streams, the second AM set is obtained by transforming a first AM set preset by the sending end, the first AM set comprises x first AM subsets, x is an integer larger than 1, the second AM set comprises z second AM subsets, and z is an integer larger than 1; the z second AM subsets are used for performing AM locking with the z third data streams