The invention provides a sliding turnover door, an operation table and a train. The sliding turnover door includes a sliding rail mechanism for mounting on a table body of an operation table, the table body having an accommodating space for accommodating a foot pedal, and a door plate assembly. The sliding rail mechanism extends from an opening portion of the accommodating space toward a bottom wall portion. The door plate assembly is movably mounted on the slide rail mechanism along the slide rail mechanism, the door plate assembly includes a turnover door plate, the turnover door plate is turnably disposed at an opening portion to shield or avoid the foot pedal when the door plate assembly is in a first working position, and the turnover door plate is positioned in an accommodating spacewhen the door plate assembly is in a second working position. The operation table is closed in the unmanned state and the operation table is opened in the manned state, thereby solving the problem that a foot pedal space device of the operation table of the fully automatic driving vehicle is artificially touched in the unmanned state in the prior art.