The utility model relates to the coiled tubing drilling technology field, and especially relates to a coiled tubing circuit three-way device. An upper connector and a lower connector of the three-way device are connected and sealed through a seal ring. A main plain cable is sleeved with a main cable sealing upper clamping sleeve, a cable sealing middle clamping sleeve and a cable sealing lower clamping sleeve. The main cable sealing upper clamping sleeve, the cable sealing middle clamping sleeve and the cable sealing lower clamping sleeve are connected in order. The main cable sealing upper clamping sleeve and the cable sealing lower clamping sleeve are sealed with the main plain cable through seal rings. The coiled tubing circuit three-way device achieves that a single circuit is divided into two circuits, facilitates to supply power for different tools in a coiled tubing drilling tubular. The coiled tubing circuit three-way device is convenient to install, has good insulation seal performances, is safe and reliable to use, and overcomes the defect that an existing coiled tubing drilling tool cannot achieve complete power supplying.