Non-extreme state two-dimensional slope stability evaluation method

The invention relates to a non-extreme state two-dimensional slope stability evaluation method, which comprises the following steps of firstly, dispersing a minimum rectangle defined by the width andthe height of a two-dimensional slope into a plurality of rectangular search grids, wherein each search grid internally comprises more than one numerical calculation unit, and the search grids are transversely arranged in rows and vertically arranged in columns and are sequentially marked, then, determining a uniquely corresponding numerical calculation unit in each search grid, and taking the uniquely corresponding numerical calculation unit as a target numerical calculation unit, then, judging a target numerical calculation unit which most possibly reaches a yield condition in each column ofsearch grids, determining a potential damage unit according to the target numerical calculation unit, and searching potential damage units of all columns in sequence, and finally, acquiring the mostdangerous slip surface thro