Present invention discloses a multi -carrier frequency cell establishing method. It contains 1, RNC transmitting cell establishing request message to Node having main carrier frequency information and number of supplement carrier frequency information cell B, requesting establishing multi - carrier frequency cell, 2, Node B establishing said multi - carrier frequency cell according to said cell establishing request message, if main carrier frequency establishing failing then transmitting cell establishing failing messages to RNC, then ending, if main carrier frequency successfully establishing but having number of supplement carrier frequency establishing failing then notifying RNC, then execution step execution step 3 if main carrier frequency and supplement carrier frequency all establishing successfully then transmitting cell establishing response message to RNC, then execution step 4, 3, RNC modifying own wireless resource state record according to said received supplement carrier frequency establishing failing information, 4, RNC originating follow-up establishing process. Said method can establish multi - carrier frequency cell in TD -SCDMA system.