Method and apparatus for mapping channel state information reference signal

A method and apparatus for mapping the channel state information reference signal is disclosed. The method includes: the map location of the sub-carrier of the channel state information reference signal is set on a first sub physical resource block of a physical resource block (S102), wherein, the physical resource block consists of the first sub physical resource block and a second sub physical resource block, the second sub physical resource block includes: the demodulation reference signal DMRS and the physical broadcast channel PBCH, the physical downlink control channel PDCCH of the first two symbols, the synchronization signal and the map location of the paging channel. Through the technical solution, it solves the problem that there is no detailed definition for the map rule of the channel state information reference signal of the Long-Term Evolution Advance (LTE-A) system, and then achieves the effects of reducing the performance degradation of the LTE users, being able to ensure the performance of the channel measurement, and improving the throughput of the LTE-A system.