The invention discloses a system for valve leaflet repair in a minimally invasive surgery. The system comprises a conveyor and a repair component that enable a linkage release operation, wherein theconveyor comprises an operating handle, a positioning sheath, an outer tube clamp, an outer conveying tube, a conveying needle and a pushing tube; the operating handle is internally provided with three layers of sleeves, which are the pushing tube, the conveying needle and the outer conveying tube respectively from the inside to the outside; the operating handle comprises a pull rod, a push handleand a hold handle; the pull rod is externally sleeved with the push handle; the push handle is externally sleeved with the hold handle; a first tube seat, a second tube seat and a third tube seat arearranged in the operating handle in sequence from left to right in an extension direction; the pull rod is connected with the first tube seat; the push handle is connected with the second tube seat;and the hold handle is connected with the third tube seat. The system is suitable for the repair of valve leaflets in the minimally invasive surgery and simple to operate, and can realize one-key release and repair operation and reduce the difficulty of operation and patient suffering.