Disclosed is a milk preparation assembly, comprising a milk bottle (10), a milk powder box (20) and a connecting body (30), wherein an upper end of the milk powder box (20) can match and connect with a nipple, a lower end thereof connects with the milk bottle (10) via the connecting body (30), and the milk powder box (20) has a movable box bottom formed by an insertable/withdrawable blocking plate (24). An upper part of the milk bottle (10) and the connecting body (30) are both dual-layered structures, an outer layer of the upper part of the milk bottle (10) matching and connecting with an outer layer of the connecting body (30), and an inner layer of the upper part of the milk bottle (10) matching and connecting with an inner layer of the connecting body (30). After the blocking plate (24) is inserted into an insert hole (321) on a wall (32) of the outer layer of the connecting body (30), the blocking plate forms a movable box bottom of the milk powder box (20), sealing milk powder in the milk powder box (20), and at this point, the outer layer of the upper part of the milk bottle (10) is partially joined to the outer layer of the connecting body (30), forming a state ready for milk preparation after the blocking plate (24) is withdrawn from the insert hole (321), the connecting body (30) can continue to be turned in the direction of the milk bottle (10) so as to make the inner layer of upper part of the milk bottle (10) match and connect with the inner layer of the connecting body (30), constituting a milk powder channel sealed and isolated from the outside. The bottom of the milk powder box of the milk preparation assembly of the present invention is not prone to milk powder residues and is easy to clean. The sealing performance of the milk powder box and the milk powder channel during preparation of powdered milk is good.La présente invention concerne un ensemble de préparation de lait, comprenant une bouteille de lait (10), une boîte de poudre de lait (20) et u
