The utility model relates to a cup bottom paper cutting and delivering mechanism for a high-speed paper cup machine. Guide sleeves are arranged in inner holes of a lower guide holder and a middle guide sleeve holder and form a crest clearance with a sliding seat; a sliding plate is square, and inner holes at four corners are provided with upper guide sleeves; the upper guide sleeves respectively form a clearance fit with guide posts, and an eccentric wheel is driven by a driving mechanism to drive the sliding plate to move up and down; the guide posts locate and guide the sliding plate, and the middle and lower guide holders locate and guide the sliding seat, thereby forming a three-locating guide cup bottom cutting structure; the inner holes of the sliding seat are provided with push rod guide sleeves which respectively form a clearance fit with push rods; the lower end of each push rod is connected with a cam rocker transmission mechanism; and the push rods move up and down to constitute a double-locating guide push structure through the up and down distribution of the push rod guide sleeves. The cup bottom cutting structure adopts three-locating guide to cut the cup bottom, thereby enhancing the service life and cutting quality of the knife die. The cup bottom push structure adopts double-locating guide to directly push the cup bottom upwards into the cup body, thereby prolonging the service life of the push rods and cup bottom push die, and removing the cup bottom delivery link.