The invention relates to a sectional light-emitting diode (LED) flexible light bar, comprising a plurality of LED flexible light bar bodies, a dual socket plugging board, a stabilized voltage supply and a stabilized voltage socket, wherein plugs are respectively arranged at the front end and the rear end of each LED flexible light bar body; sockets are respectively formed in the front end and the rear end of the dual socket plugging board; an elastic button is arranged at the upper end of the dual socket plugging board; the LED flexible light bar body at the initial end is connected with the rear part of the stabilized voltage supply through one plug; the LED flexible light bar body at the tail end is connected with the rear part of the stabilized voltage socket through the plug; a plurality of LED flexible light bar bodies at the middle part are plugged through the plugs and the sockets of the dual socket plugging board, so as to achieve mutual connection of the LED flexible light bar bodies; each LED flexible light bar body is connected with a mounting frame through a thread plug at the lower part. By improvement, all LED flexible light bar bodies are affected by each other, and the sectional LED flexible light bar has the characteristics of being convenient to transport and store, firm in inner and outer structures, convenient to install, attractive in appearance, energy-saving and environment-friendly, long in service life, and low in use cost.