Abstract: Investigations were performed with respect to the photocatalytic degradation and mineralization of H-acid aqueous solution in suspended photocatalytic reactor and suspended photocatalytic nanofiltration membrane reactor respectively. Compared to the traditional suspended photoreactor，the innovative photocatalytic membrane reactor was found to be more photoactive and attractive. Under the conditions of the ratio ρ/ρ0 (the ratio of instant H-acid concentration to the initial one) larger than 0.7，the initial substrate concentrations of 50，100 and 150 mg·L-1 respectively，the photocatalytic degradation reaction processes of H-acid aqueous solution in suspended photocatalytic reactor were observed to follow typical Langmuir-Hinshelhood first-order reaction model，first-order reaction model，and the combination of zero-order and first-order reaction model，as compared with L-H first-order reaction model，the combination of zero-order and first-order reaction model，and L-H zero-order reaction model in the innovative photocatalytic membrane reactor.