Disclosed is a phototherapeutic device (100, 200, 300, 400, 600, 700, 800, 900), including a flexible base (110, 210, 470, 640, 710, 810, 910), a printed circuit board (130, 240, 420), a conductive electrode group (140, 421), a power supply unit (150, 230, 430, 620, 720, 820, 920), a light-emitting unit (160, 220, 422, 630, 730, 830, 930) and a top cover (170, 440, 610). The printed circuit board (130, 240, 420) is arranged above the flexible base (110, 210, 470, 640, 710, 810, 910), and the printed circuit board (130, 240, 420) includes a drive circuit. The conductive electrode group (140, 421) is assembled on the printed circuit board (130, 240, 420), and the conductive electrode group (140, 421) includes a positive contact (140a, 421a) and a negative contact (140b, 421b). The power supply unit (150, 230, 430, 620, 720, 820, 920) is arranged above the conductive electrode group (140, 421), and the power supply unit (150, 230, 430, 620, 720, 820, 920) includes a positive contact (150a, 430a, 620a, 730a, 820a, 920a) and a negative contact (150b, 430b, 620b, 730b, 820b, 920b). The light-emitting unit (160, 220, 422, 630, 730, 830, 930) is arranged between the printed circuit board (130, 240, 420) and the flexible base (110, 210, 470, 640, 710, 810, 910), and the light-emitting unit (160, 220, 422, 630, 730, 830, 930) is electrically connected to the power supply unit (150, 230, 430, 620, 720, 820, 920) and the drive circuit. The top cover (170, 440, 610) is arranged above the power supply unit (150, 230, 430, 620, 720, 820, 920) and covers the power supply unit (150, 230, 430, 620, 720, 820, 920), the conductive electrode group (140, 421), the printed circuit board (130, 240, 420) and the light-emitting unit (160, 220, 422, 630, 730, 830, 930). The positive contact (140a, 421a) and the negative contact (140b, 421b) of the conductive electrode group (140, 421) are in constant contact with the positive contact (150a, 430a, 620a, 730a, 820a, 920a) and the negative conta
