Acid-base titration device capable of controlling liquid outlet amount

The acid-base titration device comprises a base, a fixed column is fixedly connected to the central axis of the top of the base, an adjusting lantern ring is movably connected to the outer wall of the fixed column in a sleeved mode, first sliding grooves are formed in the two sides of the outer wall of the fixed column, first sliding blocks are slidably connected to the interiors of the first sliding grooves, and second sliding blocks are slidably connected to the interiors of the first sliding blocks. The two first sliding blocks are fixedly connected with the two sides of the inner wall of the adjusting lantern ring. According to the dropper fixing device, the adjusting lantern ring is pulled according to the using height, the position is fixed through the first screw rod, a dropper needing to be used is placed between the first fixing hoop and the second fixing hoop, and the first fixing hoop and the second fixing hoop adjust the size of the dropper fixing space through the elastic force of the adjusting b