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A novel multi-tube photoreactor with 0.0188 m3 valid reaction volume was constructed in pilot-scale.This rectangular reactor consisted of 13 regularly distributed silica glass tubes coating with TiO2 thin film photo-catalyst. Total active area of TiO2 thin film is 0.3916m2. The ratio of surface area to volume achieves 20.8m-1.Photocatalytic experiment of phenol red demonstrates that the apparent reaction rate constant (k) is 0.074 65 h-1and 0.165 02 h-1 for reaction system with and without micro-bubbles mixing. The corresponding apparent quantumefficiency (φa) is 8.1771 × 10-7 g.J-1 and 4.9036 × 10-7 g.J-1, respectively. COD value of reactant could decreaseto 17 mg.L-1 and high performance liquid chromatography (HPLC) only shows two absorption peaks in 24 h pho-tocatalytic process time, so this photoreactor has good photomineralization effect. Experimental results reveal thatphotocatalytic destruction of organics is possible by using the multi-tube photoreactor.