A decorative lamp, including a lampshade, a luminophor and conductive wires connected with the luminophor. The decorative lamp includes a wire trapper, one end portion is disposed between the conductive wires and a housing with opened inner space. The wire trapper is disposed inside the inner space, the conductive wires extend out of an opened end of the inner space to be connected to an external power supply with one end portion of the wire trapper and an inner wall of the housing defining the inner space press and fix the conductive wires. The lampshade and the housing respectively include structures that cooperate to form a sealing assembly. The decorative lamp may also be modified by replacing the cooperation between the lampshade and the housing by a snap-fit member such that the luminophor extends out of the snap-fit member and forms a tight cooperation with the snap-fit member.