The invention discloses a focusing metasurface array antenna. The array antenna is an array phase plate formed by arranging two or more phase shifting units; each phase shifting unit comprises a dielectric layer; a square annular metal patch is arranged on the surface of each dielectric layer; the sides of each metal patch are equal in width; a metal grounding layer is arranged at the bottom of each dielectric layer; the array phase plate comprises a central phase shifting unit which is positioned in the center and has the largest metal patch area; the central phase shifting unit is provided with multiple layers of external phase shifting units in a surrounding shape from large to small according to the surface areas of the metal patches outwards; and the number of the external phase shifting units in each layer is nX8, wherein n is the number of the layers of the external phase shifting units and is greater than or equal to 1. The array antenna has a very excellent incident wave reflection focusing effect, and the reflection efficiency can reach more than 70%; and in addition, the array antenna is simple in structure and high in unit area utilization rate of the phase shifting units, and has the advantages of being simple in manufacturing process and low in cost.