A novel monopole antenna possesses miniaturization, super-wideband (SWB) and unidirectional properties simultaneously is proposed. The antenna is designed to increase the high-frequency impedance bandwidth while reducing the antenna size through the equal cutting angle design of the radiating plate; the short-circuit plate loading technology is adopted to expand the low-frequency bandwidth by adding two short-circuit plates between the radiating plate and the metal ground.，and further realize the miniaturization of the antenna, combined with the equal slit angle design to obtain a super broadband; through the corner reflector and inclined radiation plate to achieve unidirectional radiation. The antenna sample was designed and processed. Simulation and testing showed that the antenna size without/including the reflective surface was 0.18λ×0.15λ×0.13λ and 0.18λ×0.26λ×0.31λ, where λ is the low end of the antenna working frequency band Corresponding wavelength; its |S11|<-10dB impedance bandwidth ratio reaches 25.7:1 (0.97-25GHz); it has a good unidirectional radiation pattern, and the actual gain in the working frequency band is about 1.6~11.3dBi. The antenna structure is simple, and its good performance makes it have great application prospects in the fields of broadband wireless communication.