The invention discloses a bulk acoustic wave magnetoelectric array antenna which comprises N array elements installed on a silicon substrate, and the array elements are bulk acoustic wave magnetoelectric antennas of the same structure. The bulk acoustic wave magnetoelectric antenna is formed by compounding a cavity type bulk acoustic wave resonator and a magnetostrictive film; the cavity type bulkacoustic resonator comprises a silicon substrate, an isolation layer, an air cavity, a seed layer, a lower electrode layer, a piezoelectric layer and an upper electrode layer which are stacked and combined from bottom to top, the magnetostriction film is made into a magnetostriction layer and is arranged on the upper electrode layer; the array elements are in constant-amplitude in-phase feeding,the feeding mode is alternating-current voltage feeding, and the array type is a linear array or a planar array; according to the bulk acoustic wave magnetoelectric array antenna and the preparation method provided by the invention, a plurality of bulk acoustic wave magnetoelectric antennas prepared on the same silicon wafer at the same time are arrayed, and the aims of enhancing the directivity of the antenna, improving the radiation gain of the antenna and enabling the antenna to be more suitable for application occasions in wireless communication are achieved.