Illuminant decoration device

An illuminant decoration device configured for use on a Christmas light assembly, wherein the illuminant decoration device comprises a lampshade, a clamping seat and a light string;

• the light string comprises a lamp cap assembly and a lead wire interconnecting the lamp cap assemblies;
• the lamp cap assembly comprises a lead wire end, an LED bulb, an isolating pillar and a heat shrinkable sleeve;
• the LED bulb has a positive electrode bulb pin and a negative electrode bulb pin, the lead wire end is electrically connected to the positive electrode bulb pin and the negative electrode bulb pin respectively through the lead wire, the isolating pillar is arranged between the two electrical connection bodies, and the heat shrinkable sleeve is wrapped on the outside of the entirety composed of the lead wire end, the LED bulb and the isolating pillar;
• the lampshade and the clamping seat are connected by way of clamping, an inner hole is formed after the lampshade and the clamping seat are connected by way of clamping, the inner hole fits with the lamp cap assembly, and glue is filled between the inner hole and the lamp cap assembly.