Abstract: Numerical analysis on the absorption, reflection, and attenuation of 2.45GHz mic rowave are studied by uniform plasma cylindrical slab with different values of m agnetic field intensity and various plasma parameters such as plasma density and collision frequency. The calculated results show that there exists a maximum va lue of the absorbed microwave power when the density of plasma varies, and suita ble plasma density can increase the absorbed power of microwave by plasma and re duce the reflected power by the interface. More than 85% of microwave power can be absorbed by uniform magnetized plasma with proper plasma density and proper c ollision frequency of plasma.