The present invention discloses a receiver and a method for data processing. The receiver includes a system on chip and a memory, where the system on chip is connected to the memory through an external buffer bus; the system on chip includes an LLR subsystem, a controller, a rate matching module, an incremental redundancy IR reconstructing module, and a combiner, where the LLR subsystem is connected to the controller and the rate matching module respectively; the controller is connected to the IR reconstructing module, and the rate matching module and the IR reconstructing module are connected to the combiner respectively; and the controller stores LLR data currently corresponding to a data block demodulated by the LLR subsystem into a memory, and read LLR data historically corresponding to the data block and stored in the memory into the IR reconstructing module when the data block is a retransmitted data block.