The invention relates to an antenna elastic piece assembly, processing method, and a mobile terminal. The antenna elastic piece assembly includes a PCB, and the PCB comprises a substrate, a ground network, a window opening network, and a solder mask layer, wherein the ground network and the window opening network are disposed on the substrate in a stacked manner and the ground network and the window opening network are spaced apart. The solder mask layer covers the ground network and exposes the window opening network. The antenna elastic piece assembly also comprises an antenna elastic piecewhich is disposed on the solder mask layer. A gap is formed between the ground network and the window opening network. In the case of installation deviation of the antenna elastic piece, the edge of the antenna elastic piece is placed directly above the gap, and the antenna elastic piece does not make contact with the ground network to cause a short circuit fault. Even if the installation deviation of the antenna elastic piece is bigger and the antenna elastic piece makes contact with the window opening network, the gap cuts off the electric connection between the window opening network and the ground network, and the antenna elastic piece cannot form electric connection with the ground network, thereby effectively avoiding the short circuit fault.