A method for preparing TA2 hot-rolled pure titanium plates based on an oxygen equivalent annealing process, the specific steps are as follows: select titanium sponge, titanium dioxide, titanium sheets, titanium chips and titanium tubes, titanium sheets, titanium chips and titanium tubes by shearing, After sorting and pickling treatment, it is mixed with sponge titanium and titanium dioxide, smelted into a slab in an electron beam cooling furnace, and the surface of the slab is milled, partially ground, chamfered and sawed to obtain a TA2 slab. Hot-rolled into titanium coils and cut into flats or sheet-rolled into TA2 plates; then atmospheric annealed in a roller hearth furnace, and then subjected to sandblasting, sandblasting pickling, alkali pickling or shot blasting pickling after being out of the furnace for correction One of them is processed, and the local defects on the surface are repaired to obtain a TA2 titanium plate. The present invention selects the standard of annealing process for slab oxygen equivalent and rolling mode, and then selects annealing temperature, obtains TA2 plates with qualified mechanical properties and uniform structure, improves the pass rate of TA2 titanium plates, and has low production cost and high production efficiency.