The invention provides a detection method and a device of main common control physical channel position. The detection method of the main common control physical channel position includes: step A, TD-SCDMA terminal carries out channel estimation according to Midamble code and SYNC-DL code in received TD-SCDMA subframe; step B, carry out conjugate multiplication and summarizing from two channel estimation results obtain in step A, obtain the accumulated value and calculate the phase position of the accumulated value and obtain the absolute phase position information of subframe SYNC-DL code; step C, judge PCCPCH position according to the SYNC-DL code absolute phase position information by successive subframe calculation. The detection method and the device in the invention can effectively and correctly detect the position information of PCCPCH.