This invention discloses one method to realize multiple interface signal channel on HRPD communication system, which comprises the following steps: a, establishing signal channels in the system; b, the system is connected with parameters through area composed of area interface signal channel parameters and number; c, AT receives parameters information to compute one interface channel by Harsh formula to get signal long code mask and to connect long signal channel by HRFD agreement and to add one interface section; d, sending reverse signals in channel to compute one signal channel to send reverse signals by step c.