To reduce a manufacturing cost and also to use waste effectively.

In extrusion equipment 1 for a tile ground W which is prepared by putting two tiles T in a joined state and has an intermediate layer C between surface layers D, D, a pipe 7 having a discharge port for an intermediate layer material B is disposed between a screw 5 in a first vacuum extruder 2 for a surface layer material A and a forming die 6, and the base end part of the pipe 7 is connected to a second vacuum extruder 8. According to this constitution, the intermediate layer material B deaerated and kneaded to be compact by the second vacuum extruder 8 is sandwiched in the surface layer material A, and the tile ground W is formed of the surface layers D and the intermediate layer C which are brought into close contact and integrated with each other. In the use, either the surface layer material A or the intermediate layer material B is lessened in the usage, or a waste material is mixed in either of them.