The invention discloses a novel LED string light. The novel LED string light includes a light belt wire, and a plurality of LED light bodies. Each LED light body includes a PCB substrate; an LED chip and a constant current voltage stabilizer for supplying power to the LED chip are packaged on the PCB substrate; and the PCB substrate has a plug head extending downward. The light belt wire is provided with bases for connecting the LED light bodies; plug portions are arranged on the bases; plug grooves matching the plug heads are formed in the plug portions; and electrode sheets are arranged in the plug grooves and are electrically connected to the light belt wire. The LED light bodies are arranged on the bases of the light belt wire in a plug manner, the plug structure is firm and stable, an external rectifier can be avoided, the LED light bodies are easy to change, LED light bodies with different colors can be combined, the decorative effect can be improved, the length of the light belt can be adjusted as needed by cutting the wire, and the novel LED string light is easy to use and is practical.