A mobile terminal, comprising: a screen ; a back cover , covered by the screen ; a slidable assembly , wherein the slidable assembly comprises: a slider , retractable and slidable relative to the back cover in a direction parallel to the screen , and switchable between a retraction state in which the slider is covered by the screen and an extension state in which the slider is exposed out of the screen ; at least one functional component , fixed to the slider ; and a first cover , slidably coupled to the slider with a sliding direction being perpendicular to the screen , covering the at least one functional component , and slidable along with the slider such that the first cover is covered by the screen or exposed out of the screen ; wherein when the first cover is exposed out of the screen , the first cover slides to be flush with the screen ; and a driving mechanism , fixed between the screen and the back cover , and configured to drive the slider to slide; characterized in that , the back cover comprises a middle frame fixedly connected to the screen ; the middle frame comprises a pair of first arms opposite to each other, each of the pair of first arms defines a sliding groove extending along a lengthwise direction of the pair of first arms ; the slider comprises a first outer frame , and the first outer frame is slidable relative to the sliding groove ; the at least one functional component is fixed in a space defined by the first outer frame and the middle frame . a screen ; a back cover , covered by the screen ; a slidable assembly , wherein the slidable assembly comprises: a slider , retractable and slidable relative to the back cover in a direction parallel to the screen , and switchable between a retraction state in which the slider is covered by the screen and an extension state in which the slider is exposed out of the screen ; at least one functional component , fixed to the slider ; and a first cover , slidably coupled to the slider with a sliding direction being perpendicular to the screen , covering the at least one functional component , and slidable along with the slider such that the first cover is covered by the screen or exposed out of the screen ; wherein when the first cover is exposed out of the screen , the first cover slides to be flush with the screen ; and a slider , retractable and slidable relative to the back cover in a direction parallel to the screen , and switchable between a retraction state in which the slider is covered by the screen and an extension state in which the slider is exposed out of the screen ; at least one functional component , fixed to the slider ; and a first cover , slidably coupled to the slider with a sliding direction being perpendicular to the screen , covering the at least one functional component , and slidable along with the slider such that the first cover is covered by the screen or exposed out of the screen ; wherein when the first cover is exposed out of the screen , the first cover slides to be flush with the screen ; and a driving mechanism , fixed between the screen and the back cover , and configured to drive the slider to slide; characterized in that , the back cover comprises a middle frame fixedly connected to the screen ; the middle frame comprises a pair of first arms opposite to each other, each of the pair of first arms defines a sliding groove extending along a lengthwise direction of the pair of first arms ; the slider comprises a first outer frame , and the first outer frame is slidable relative to the sliding groove ; the at least one functional component is fixed in a space defined by the first outer frame and the middle frame . <EOS>