Disclosed is a closed-type milk powder brewing device and a milk powder brewing apparatus comprising same. The milk powder brewing device comprises: a housing (1), a lid (2), a control panel (3), a central mainboard (4), a water supply mechanism (5) and a water storage & heat preservation box (6). A U-shaped cavity (101) which has an upward opening and can receive a milk bottle (10) is provided inside the housing (1)； the lid (2) coordinates with the top of the housing (1) and can close/open the U-shaped cavity (101)； the control panel (3) is provided on the outer surface of the housing (1) or the lid (2)； the central mainboard (4), the water supply mechanism (5) and the water storage and heat preservation box (6) are respectively disposed inside the housing； a water manifold (201) which can be inserted into the milk bottle (10) is provided inside the lid (2) and/or on a side of the U-shaped cavity (101), the water manifold (201) successively connecting the water supply mechanism (5) and the water storage & heat preservation box (6)； the control panel (3) is in communication connection with the central mainboard (4), an output end of the central mainboard (4) being in communication connection with a controlled end of the water supply mechanism (5). A closeable U-shaped cavity (101), a water supply mechanism (5) and a water storage and heat preservation box (6) are provided in the milk powder brewing device to brew milk powder inside the milk bottle in a closed manner, thereby effectively avoiding bacteria breeding.L'invention concerne un dispositif de préparation de lait en poudre de type fermé et un appareil de préparation de lait en poudre le comprenant. Le dispositif de préparation de lait en poudre comprend un logement (1), un couvercle (2), un panneau de commande (3), une carte mère centrale (4), un mécanisme d'alimentation en eau (5) et un compartiment de conservation de chaleur et de stockage d'eau (6). Une cavité en forme de U (101) présentant une ouverture
