The utility model relates to a medical device and discloses an adjustable lower limb raising device used for raising the lower limbs with trauma or postoperative infected limbs. The adjustable lower limb raising device comprises an underframe, a sliding cross rod, a proximal adjustment bracket, a distal adjustment bracket, a telescopic cross rod and dhoosootie. The adjustable lower limb raising device replaces the traditional soft pillow, the soft cushion or the Brauns frame, has strong flexibility, good stability and reliable functions, can preferably meet the clinical requirements; moreover, the adjustable lower limb raising device is simple and convenient to operate, is beneficial for the bedridden patients to take functional exercise as early as possible, improves the compliance and the reliability of the patients for treatment, can normalize and scientize the operation methods and control standards of raising the infected limbs and is beneficial for guiding the clinical work.