Grass collecting device and mower

The utility model discloses a grass collecting device and a mower. The grass collecting device comprises a grass collecting frame and a grass collecting bag, the grass collecting frame comprises a front frame body and a rear frame body, the front frame body is used for being connected with the mower body, the front frame body is detachably connected with the mower body, the rear frame body is rotationally connected with the front frame body, the grass collecting bag comprises a front bag part and a rear bag part, the front bag part is matched with the front frame body, and the rear bag part is matched with the rear frame body. And the front bag part and the rear bag part are connected in an openable manner. When the straw collecting bag is sleeved on the straw collecting frame, the front bag portion and the rear bag portion correspond to the front frame body and the rear frame body respectively, after the straw collecting bag is full of straw, the straw in the rear bag portion is directly discharged by rotati