A semiconductor package, a manufacturing method thereof and an encapsulating method thereof are provided. The semiconductor package includes a substrate, a semiconductor chip, a plurality of conductive parts and a sealant. The conductive parts electrically connect an upper surface of the substrate and an active surface of the semiconductor chip. The sealant covers a back surface of the semiconductor chip, wherein the space between the upper surface of the substrate and the active surface of the semiconductor chip is filled with a portion of the sealant. The back surface of the semiconductor is spaced apart from a top surface of the sealant by a first distance, the upper surface of the substrate is spaced apart from the active surface of the semiconductor chip by a second distance, and the ratio of the first distance to the second distance is smaller than or equal to 5.