A latch bolt buffer structure for a lock body, comprising an outer lining board for the lock body, a box cover for the lock body, a box bottom assembly for the lock body, a latch bolt assembly, a damper, a connecting rod, a dead bolt mechanism and a latch bolt poking mechanism, the box bottom assembly for the lock body being formed by welding a box bottom and an inner lining board for the lock body, a bottom plate surface of the box bottom being provided with a positioning plate, and the positioning plate being provided with a U-shaped groove, wherein: the latch bolt assembly comprises a latch bolt, a silencing friction bolt, a pull rod, a spring, a limiting silencing ring, and a slider, the middle of the latch bolt is provided with the silencing friction bolt; the pull rod is fixed on a rear end of the latch bolt, the spring and the limiting silencing ring are mounted in the pull rod, and a positioning ring is provided on a tail of the pull rod and embedded in a positioning groove on the slider; the limiting silencing ring is clamped in the U-shaped groove on the positioning plate, the latch bolt assembly is connected to the damper through the connecting rod, the slider is provided with a connecting rod pivot, the damper is provided with a damping flat shaft, wherein one end of the connecting rod is provided with a movable pivot hole pivotally connected to the connecting rod pivot, and another end of the connecting rod is provided with an embedded flat groove in which the damping flat shaft is embedded, and when the latch bolt extends (or retracts), the slider slides together with the pull rod, the connecting rod pivot slides in the movable pivot hole and drives an end of the connecting rod having the movable pivot hole to swing, the connecting rod transmits a swing moment to the damper through the embedded flat groove and the damper flat shaft,or wherein one end of the connecting rod is provided with a pivot hole pivotally connected to the connecting rod pivot, another end of the connecting rod is provided with a sliding groove in which the damping flat shaft is embedded, the damping flat shaft is slidable in the sliding groove, and when the latch bolt extends (or retracts), the slider slides together with the pull rod, and at the same time drives the end of the pivot hole of the connecting rod to swing, the connecting rod transmits the swing moment to the damper through the sliding groove and the damper flat shaft, and the damper generates rotational resistance to slow down the swing moment. the latch bolt assembly comprises a latch bolt, a silencing friction bolt, a pull rod, a spring, a limiting silencing ring, and a slider, the middle of the latch bolt is provided with the silencing friction bolt; the pull rod is fixed on a rear end of the latch bolt, the spring and the limiting silencing ring are mounted in the pull rod, and a positioning ring is provided on a tail of the pull rod and embedded in a positioning groove on the slider; the limiting silencing ring is clamped in the U-shaped groove on the positioning plate, the latch bolt assembly is connected to the damper through the connecting rod, the slider is provided with a connecting rod pivot, the damper is provided with a damping flat shaft, wherein one end of the connecting rod is provided with a movable pivot hole pivotally connected to the connecting rod pivot, and another end of the connecting rod is provided with an embedded flat groove in which the damping flat shaft is embedded, and when the latch bolt extends (or retracts), the slider slides together with the pull rod, the connecting rod pivot slides in the movable pivot hole and drives an end of the connecting rod having the movable pivot hole to swing, the connecting rod transmits a swing moment to the damper through the embedded flat groove and the damper flat shaft,or wherein one end of the connecting rod is provided with a pivot hole pivotally connected to the connecting rod pivot, another end of the connecting rod is provided with a sliding groove in which the damping flat shaft is embedded, the damping flat shaft is slidable in the sliding groove, and when the latch bolt extends (or retracts), the slider slides together with the pull rod, and at the same time drives the end of the pivot hole of the connecting rod to swing, the connecting rod transmits the swing moment to the damper through the sliding groove and the damper flat shaft, and the damper generates rotational resistance to slow down the swing moment.