The invention discloses a channel distribution method of multi-carrier code division multiple access system, comprising: in each section, selecting one or several frequency points as the main carrier frequency from the distributed frequency points while the left frequency points as auxiliary carrier frequency; according to the priority level, transmitting the downward guide time slot, the broadcast information and the calling information on the main carrier frequency with highest priority and arranging other public control channel on other main carrier frequency; indicating the main carrier frequency of system, so the base station can find the frequency of transmitting broadcast and calling information, and adding the information of frequency points on the all distributed information of all channels; the main and auxiliary carrier frequencies use the same disturbing code and the basic training sequence; operating the multi-time slot arrangement on same carrier frequency; setting the upward-downward switching points of main and auxiliary carrier frequencies as same. The invention can arrange a plurality of main carrier frequencies to provide the public access control channel service and reduce the interface probability and the access time in the accessing time of user terminal.