The invention discloses an adjustable tablet dividing bottle. The adjustable tablet dividing bottle comprises a medicine bottle body, wherein an observing hole is formed in the outer side wall of themedicine bottle body, a bottle cap is connected to the top of the medicine bottle body by threads, anti-skidding threads are arranged on the periphery of the outer side wall of the bottle cap, adjusting holes are formed in two side walls of the bottle cap, adjusting rods are arranged in the adjusting holes in a penetrating manner, pull rings are fixed at the tail ends of the outer sides of the adjusting rods, the tail ends of the inner sides of the adjusting rods pass through slotted holes to be fixed to adjusting plates, the adjusting plates are positioned at the inner wall side of a tablet groove, the slotted holes are formed in the wall of the tablet groove at the rear sides of the adjusting plates, the tablet groove is formed in the central position of the bottle cap, two sides of thetablet groove are provided with a pressure plate preformed groove and a medicinal powder groove, a blade preformed groove is arranged in the center of the pressure plate preformed groove, a pressure cover is arranged at the upper side of the bottle cap, a turntable is arranged on the inner wall of the pressure cover, and a grinding plate and a cutter are fixed to the bottom of the turntable. For the adjustable tablet dividing bottle, by virtue of the adjusting plates, the tablets of different sizes can be rapidly fixed and sliced, meanwhile, the grinding plate can grind the tablets into powderfor use, and the application range is wide.