Abstract: Two-dimensional layered double hydroxide (LDH) of Ni₇Fe₁ is the most excellent catalyst in the catalytic system for its facile preparation, abundant sources, and low-cost, which is also an ideal substitute for noble metal catalyst in photocatalytic production. In this study, we prepared composites of Ni₇Fe₁/PDBTSO by in-situ polymerization of Ni₇Fe₁ and poly(dibenzothiophene-S,S-dioxide) (PDBTSO). Furthermore, we investigated their catalytic performance. The experimental results show that 15-Ni₇Fe₁/PDBTSO exhibites the hydrogen generation rate of 36.8 mmol·g⁻¹·h⁻¹, which is 22.6% higher than that of PDBTSO with 3wt% Pt as co-catalyst. Besides, 15-Ni₇Fe₁/PDBTSO shows good photocatalytic stability, making it an ideal candidate for photocatalytic hydrogen production. XRD, FTIR, TEM and XPS were used to explore the mechanism of photocatalytic hydrogen production performance. The high photocatalytic efficiency and low cost of Ni₇Fe₁/PDBTSO provide a new idea for the field of photocatalytic hydrogen production.