A soft switching method in CDMA system based on mobile agent includes setting mobile agent platform in each base station and MS to set up, move, operate and recall mobile agent; generating mobile agent entity to call BC and using mobile agent to bring back relevant information to be distributed to MS service channel by BS when that pilot frequency intensity of base station B is over threshold is discovered by MS using base station A for communication, transferring soft switch management in MSC to each base station to realize distribution management when BS is called on by mobile agent.