Method of placing products on the floor of a grouping station (3), in aisles (5), to form a batch of products to be palletized, including withdrawing guide walls (6) forming the aisles (5) to an inactive position; moving the batch towards the palletization station (11); repositioning the guide walls (6) into an active position; and re-placing a mechanism (10) for moving the rows into their starting position by turning them about the guide walls (6). The station (3) for grouping products (2) is arranged between the selection station of the receiving line (1) and the table (12) of the palletization station (11) and includes: motorized conveyor (4); guide walls (6); thrust devices (40) for conveying the batch onto the table (12); a mechanism for withdrawing the guide walls (6); and a mechanism for imparting to the thrust devices (40) a turning movement about the guide walls (6).