The invention discloses a method and device for manufacturing porous floor tiles or porous wall tiles. Calcium powder, potassium feldspar, lithium feldspar, white clay, smolmitza, bentonite and blank return clinker pass through a comprehensive mixing analysis tower according to a certain proportion; a high pressure shape extruding machine is used, a porous extruding mold is arranged on a machine base, porous tile blanks are formed through extrusion, discharged blanks are conveyed into a drying box through a chain conveying belt and are conveyed to a firing kiln through a chain, natural gas burning heads are arranged on the two sides of the interior of the firing kiln, a heat pumping system is arranged above the interior of the kiln, a firing section and a cooling section are arranged in the kiln, and the blanks are conveyed to a packaging frame through a roller conveying belt to be packaged into bags; and a PPR thermoplastic hose is installed after the porous tiles are formed, a connecting pipe is reversely buckled for connection, and the light high-calcium tiles with the high solar energy absorbing capacity are formed through connection.