The utility model relates to a public chair with adjustable handrails. The public chair comprises a sitting surface body and is characterized in that the sitting surface body is combined with a cylindrical object through a rotating shaft; the plurality of rotating handrails are arranged on the rotating shaft; and the position of each handrail can be adjusted through the rotating shaft, and thus sitting surface space can be adjusted. Compared with the prior art, the public chair with the adjustable handrails has the beneficial effects that the sitting surface space can be adjusted through the rotating handrails, thus the demands of different groups and people in different numbers can be met, and convenience is provided for a user.