The invention relates to a device for recycling treatment of hydrochloric acid in waste liquor. The device comprises a support frame and a recovery tank fixed to the top of the support frame. A partition plate is fixed to the inner wall of the recovery tank, the partition plate and the upper half portion of the recovery tank form a recovery cavity, and the partition plate and the lower half portion of the recovery tank form a heating cavity. A heating device is installed in the heating cavity, and the heating cavity is also filled with a heat conducting fluid. The boiling point of the heat conducting fluid is 60 DEG C-80 DEG C. An air outlet pipe is fixed to the top of the recovery cavity, a liquid outlet is fixed to the right outer wall, near the bottom, of the recovery cavity, and a buffer chamber communicated with the recovery cavity is fixed to the left outer wall, near the top, of the recovery cavity. The device has the advantages of convenient use and high degree of automation.