Back shell of mobile terminal and preparation method of back shell of mobile terminal

The preparation method comprises a preparation method of the back shell of a mobile terminal. The preparation method includes the following steps that: the initial blank shell of the back shell is prepared, and the size of the inner cavity of the initial blank shell is the same as the size of the inner cavity of a back shell to be prepared; an antenna slot is formed in the initial blank shell; a plastic filler which is formed in advance through injection molding and is used for filling the antenna slot is pasted in the antenna slot at the inner surface of the initial blank shell; and structural molding machining is performed on the initial blank shell bonded with the plastic filler, so that the back shell of a required structure can be prepared. The invention also discloses a back shell of a mobile terminal. According to the preparation method of the back shell of the mobile terminal provided by the embodiments of the invention, the plastic filler which is formed in advance through injection molding is adopte