Abstract: A high-efficiency and end-fire radiating miniaturized antenna based on spoof surface plasma polaritons (SSPP) is proposed. Single-sided printing on the dielectric board includes three parts: coplanar waveguide (CPW), wave vector matching structure and SSPP transmission line. The wave vector matching structure is combined with the coplanar waveguide part to better complete impedance matching. In addition, because spoof surface plasma polariton can confine the electric field in the grooves on the surface of the antenna, the antenna can achieve efficient directional radiation. The antenna test results show that the working bandwidth is 26-32 GHz, the maximum gain is 10.44 dB, and the average efficiency is 94.3%. This antenna has some potential applications for the high frequency field of 5G.