In order to realize the application of patch antenna in missileborne terminal guidance, a new directivity patch antenna based on the phase gradient is designed. This paper utilizes phase gradient metasurface for changing the characteristics of electromagnetic wave propagation in direction, and designs a new patch antenna whose main lobes are deviated from normal of patch antenna at large angle. The antenna consists of seven Hshaped patches, and a desired phase gradient is obtained by optimizing the structure parameters. The results show that with the introduction of phase gradient, the main lobes of the antenna deviated from normal are about 45° in maximum gain direction while operating frequency is 9.6 GHz.