Abstract: The present invention relates to the technical field of communications, and in particular relates to an array antenna apparatus and a preparation method therefor, and an electronic device. The array antenna apparatus includes a first substrate and a second substrate which are provided from top to bottom. A first antenna is provided on the first substrate, a second antenna is provided on the second substrate, the first antenna is provided with a plurality of array elements arranged in an array, the second antenna is provided with a plurality of array elements arranged in an array, and the projections, on the second substrate, of all the array elements of the first antenna and all the array elements of the second antenna do not completely coincide. The present invention has the advantages of low sidelobe, large bandwidth, and multiple beams, etc.