The invention discloses an extrusion-type easy-to-mark easy-to-press fan-shaped counting surface sampling culture dish. The culture dish comprises a dish bottom and a dish cover, wherein the dish bottom is provided with a second buckle and a first buckle, which form a stable embedding structure, when in stress, the embedding structure can be released, so that a movable dish bottom side wall can move relative to a first dish bottom side wall, a marking area enables the marking work to be more efficient, a pressing table enables the movable dish bottom side wall to be more convenient to move, and radioactive rays can simplify a counting process of a bacterial colony.