A flat linear vibration motor is disclosed. The flat linear vibration motor includes a housing having an accommodation space, a first magnet received in the accommodation space and fixed in the housing, a vibrator unit suspended in the housing, the vibrator unit including a third magnet, a driving magnet, and a fourth magnet, the third magnet being such configured that a magnetic pole thereof is similar to an adjacent magnetic pole of the first magnet, a second magnet fixed in the housing, the first magnet, the vibrator unit and the second magnet arranged one by one along a vibration direction of the vibrator unit; the second magnet being such configured that a magnetic pole thereof is similar to an adjacent magnetic pole of the fourth magnet, a guiding member provided for enabling the vibrator unit being suspended within the housing, and guiding the vibrator unit moving along the vibration direction, the guiding member having an inner magnet fixed on the vibrator unit and an outer magnet surrounding the inner magnet, separated from the inner magnet and attached on the housing, a magnetic pole of the inner magnet is similar to an adjacent magnetic pole of the outer magnet, and a driving coil received in the accommodation space and opposed to the driving magnet.