The utility model relates to an LED (Light Emitting Diode) driving power supply circuit, especially relates to the LED driving power supply circuit with a high-accuracy light-adjustable and current self-sharing technology. The LED driving power supply circuit with the high-accuracy light-adjustable and current self-sharing technology comprises: an isolated single-ended output voltage source; a current sharing control module and an LED load unit formed by a plurality of LED lamps, which are respectively connected with an output positive electrode of the single-ended output voltage source; and a current sharing driving module, wherein one end of the current sharing driving module is connected with the current sharing control module, and the other end of the current sharing driving module is connected with the LED load unit, and an output negative electrode of the single-ended output voltage source is connected with a grounding end. The LED driving power supply circuit of the utility model has the beneficial effects that: the LED driving power supply circuit has the advantages of reasonable design, simple structure and complete utility; service life and brightness uniformity of the LED light sources at each branch can be ensured; and size of the current of the each branch can be changed, thus different kinds of LED lamps can be lightened or brightness of the LED lamps can be adjusted correspondingly.