Abstract: A cyclotron superradiance(SR) which combines the merits of cyclotron and SR has a potential advantage in developing superradiant HPM sources operating at millimeter and submillimeter wavebands. The working characteristics of the cyclotron SR was analyzed using 3D PIC simulation,based on which the working parameters were optimized. A square relation between the beam pulse width and the peak power was given, which proved that the system worked in the SR regime. Preliminary experiment shows that when the beam parameters were 210 kV, 250 A and the guiding magnetic field was 1.73 T, microwave pulses were acquired, with the peak power of 6 MW, the peak power conversion efficiency of 11.4%, the frequency of 37.2 GHz and TE01 output mode. The results are in accordance with the simulation ones.