The invention provides a long text error correction method and device based on artificial intelligence, and a computer readable medium. The method comprises the following steps that: when the originalfragment of a nondedicated noun is present in a long text, according to a preset PT (Phrase Table) in the field of the long text, carrying out PT segment recalling on the original segment which needsto be subjected to error correction to obtain the candidate segment set of the original segment, utilizing a pre-trained segment marking model to independently carry out marking on each candidate segment in the candidate segment set, wherein the candidate segment set comprises a plurality of candidate segments; and according to the score of each candidate segment, through a decoding way, obtaining a target segment corresponding to each original segment from the candidate segment set of each original segment, which needs to be subjected to the error correction, of the long text, and therefore,obtaining the error correction text of the long text. Through the technical scheme of the invention, deficiencies in the prior art are made up, a long text error correction scheme is provided, wrongsegments in the long text can be corrected, and the editing quality of the long text is effectively improved.