The invention provides a grounding component and a mobile terminal composed of the grounding component, wherein the grounding component comprising a support element and a connector part is used for connecting a functional device with middle-frame electricity of the mobile terminal. The support element is used for supporting and fixing the functional device and electrically connecting the functional devices; the connector part is used for fixedly connecting the middle frame; the connector part is connected between the support element and the middle frame so as to achieve the grounding connection of the functional device; the roughness of the contact surface between the connector part and the support element is smaller than the preset roughness.