The invention discloses a blackboard suitable for the teaching field. The blackboard comprises a frame, a bracket is arranged at the bottom end of the frame, a writing board is arranged in the frame,second supporting plates are arranged at the upper end and the lower end of the interior of the frame respectively, first supporting plates are arranged on the right sides of the second supporting plates, the first supporting plates are connected with the frame, rotating blocks are arranged at the top ends of the first supporting plates, the rotating blocks are connected with the first supportingplates through rotating rods, and sponges are installed on the left sides of the rotating blocks. According to the blackboard suitable for the teaching field, the first supporting plates in the framedrive roller wheels to rotate to make the writing board rotate, the use length of the writing board is effectively increased, written fonts can be effectively reserved, the situation that important knowledge is wiped off and accordingly students cannot remember is avoided, and the use effect of the blackboard is enhanced. The sponges on the rotating blocks move up and down by rotating the rotatingrods so that the fonts on the blackboard can be effectively erased, waste of time is reduced, and harm of dust to the body is reduced.