Lens loading structure and vehicle-mounted camera

The utility model provides a lens loading structure and a vehicle-mounted camera. The lens loading structure is used for loading a lens. The lens loading structure comprises a circuit board and a lens mounting seat. The optical axis of the lens is aligned with the photosensitive chip of the circuit board; an opening boss is arranged at the top of the lens mounting seat; a cavity body is formed in the inner circumference of the opening boss; the lens is installed on the opening boss. The circuit board is fixed in the cavity through a fixing piece; wherein the head part of the fixing piece is provided with an annular side wall, and the circuit board is pressed through the annular side wall. According to the lens loading structure and the vehicle-mounted camera provided by the utility model, the circuit board is locked by using the fixing piece, such as a sunk screw, so that an axial pre-tightening force is provided for the circuit board, and the annular side wall of the fixing piece is also propped against the