Propose a new degradation call admission control(DCAC)scheme, which can be used in wideband code division ultiple access communication system. So-called degradation is that non-real time call has the characteristic of variable bit rate, o decreasing its bit rate can reduce the load of the system, consequently the system can admit new call which should be blocked hen the system is close to full load, therefore new call’s access probability increases. This paper brings forward design project nd does system simulation, simulation proves that DCAC can effectively decrease calls’ blocking probability and increase the otal number of the on-line users. Propose a new degradation call admission control (DCAC) scheme, which can be used in wideband code division ultiple access communication system. So-called degradation is that non-real time call has the characteristic of variable bit rate, o decreasing its bit rate can reduce the load of the system, as the system can admit new call which should be blocked hen the system is close to full load, therefore new call’s access probability increases. This paper brings forward design project nd does system simulation, simulation proves that DCAC can effectively decrease calls’ blocking probability and increase the total number of the on-line users.