A protective case for a mobile terminal , the mobile terminal comprising a middle frame and a slider slidable relative to the middle frame ; the protective case comprising: a body portion having a periphery comprising: a first straight edge ; a second straight edge opposite to the first straight edge ; and a top edge connected between the first straight edge and the second straight edge ; and a rim portion fixed to the periphery of the body portion , wherein the rim portion is connected to the first straight edge and the second straight edge , and disconnected to the top edge ; the rim portion comprises: an internal surface facing towards the body portion ; an external surface opposite to the internal surface ; and a top end surface , connected to the internal surface and located at one end of the rim portion that is close to the top edge ; wherein a sliding groove is defined in the rim portion ; characterized in that a length of the sliding groove is less than a length of the rim portion , the sliding groove is recessed from the internal surface in a direction towards the external surface , and further extends to the top end surface ; wherein, when the protective case is sleeved at the outer side of the mobile terminal , the slider is capable of extending or retracting relative to the top edge without contacting the rim portion . a body portion having a periphery comprising: a first straight edge ; a second straight edge opposite to the first straight edge ; and a top edge connected between the first straight edge and the second straight edge ; and a first straight edge ; a second straight edge opposite to the first straight edge ; and a top edge connected between the first straight edge and the second straight edge ; and a rim portion fixed to the periphery of the body portion , wherein the rim portion is connected to the first straight edge and the second straight edge , and disconnected to the top edge ; the rim portion comprises: an internal surface facing towards the body portion ; an external surface opposite to the internal surface ; and a top end surface , connected to the internal surface and located at one end of the rim portion that is close to the top edge ; wherein a sliding groove is defined in the rim portion ; characterized in that a length of the sliding groove is less than a length of the rim portion , the sliding groove is recessed from the internal surface in a direction towards the external surface , and further extends to the top end surface ; wherein, when the protective case is sleeved at the outer side of the mobile terminal , the slider is capable of extending or retracting relative to the top edge without contacting the rim portion . an internal surface facing towards the body portion ; an external surface opposite to the internal surface ; and a top end surface , connected to the internal surface and located at one end of the rim portion that is close to the top edge ; wherein a sliding groove is defined in the rim portion ; characterized in that a length of the sliding groove is less than a length of the rim portion , the sliding groove is recessed from the internal surface in a direction towards the external surface , and further extends to the top end surface ; wherein, when the protective case is sleeved at the outer side of the mobile terminal , the slider is capable of extending or retracting relative to the top edge without contacting the rim portion . <EOS>