The utility model relates to an owner becomes basic technical field, is to be directed against the assembled owner becomes basis that current owner becomes foundation construction inconvenience, cycle length, the quality is poor and provide, will mainly become 2 kinds of component mills prefabrications of basis share to on -the -spot installation has improved the efficiency of construction, has guaranteed construction quality, has reduced engineering cost. The scheme that adopts is directly passed through mould integrated into one piece bottom plate and is passed through mould integrated into one piece camber beam in the mill in the mill, the lower extreme of camber beam be equipped with downwardly extending's first grafting portion and second socket portion, is equipped with on the bottom plate and supplies first grafting portion and first spout of second socket portion male and second spout respectively, and the grafting portion of camber beam lower extreme can be in its corresponding spout slides along spout length direction, each grafting portion of camber beam inserts to the spout of bottom plate and through injecting cementitious material with both fastening connections after having adjusted the position.