Mobile terminal and circuit board assembly thereof

The utility model provides a mobile terminal and a circuit board assembly thereof. The circuit board assembly comprises a grounding base, a circuit board, a grounding elastic sheet and a fastener. Wherein the grounding elastic sheet comprises a fixed part and an elastic part connected with the fixed part, the fixed part of the grounding elastic sheet is fixed with the surface of the circuit board,and a bayonet of the elastic part is clamped with an extension part of the grounding base, so that static electricity on the circuit board is conducted to the grounding base by the grounding elasticsheet, the grounding of the circuit board is realized, and the grounding reliability of the circuit board is ensured. Furthermore, the fastener is in fastening fit with the grounding body and the mounting hole on the extension part. The extension part penetrates out of the via hole of the circuit board, so that the fastening depth of the fastener in the grounding base is increased, the connectionbetween the circuit board a