Abstract: To realize high efficiency and wide band reflection cross polarization conversion of horizontal and vertical incident electromagnetic waves, a new type of anisotropic metasurface (MTS) structure was presented, which was simulated by numerical simulation methods and analyzed by finite element method. Results show that the electromagnetic response spectrum of the designed double-cross metasurface generates four resonance regions, which leads to the expansion of the polarization conversion bandwidth. The response frequency band covers the Ku band in the range of 10.7-18.7 GHz, and the polarization conversion ratio (PCR) is more than 0.94. Additionally, good polarization conversion performance can be maintained in the range of 0° -50°. The polarization converter has simple geometry and a wide working frequency band, which may have potential application in camouflage stealth, radar communications and antennas.