De-interleaving method and device for rate de-matching

The invention discloses a de-interleaving method and device for rate de-matching. The method includes the steps of: A, caching code block data by data cache FIFO (first in first out); B, reading and analyzing packet data of the code block data by a code block parameter analyzing unit to obtain the code block parameter; C, acquiring a storage address of the code element data outputted by the data buffer FIFO according to the code block parameter by a data storage address calculating unit; and D, storing the code element data to the corresponding position according to the storage address of the code element data by the code element data storage RAM. The method provided by the invention obtains a code block parameter indication signal of the code block data by analyzing the packet data of the interleaved code block data, rapidly and simply realizes the universal de-interleaving of the Turbo code and the convolutional code according to the characteristics of interleaving matrixes of the Turbo code and the convolutional code, and saves the expenses of the system logic resources and the RAM resources.