Designing an organic polymer photocatalyst for efficient hydrogen evolution with visible and near-infrared (NIR) light activity is still a major challenge. Unlike the common behaviour of increasing the charge recombination gradually while shrinking the bandgap, here we present a series of polymers nanoparticles (Pdots) based on ITIC and BTIC units with different π-linkers between the acceptor-donor-acceptor (A-D-A) repeated moieties of the polymer, which acts as an efficient single polymer photocatalyst for H2 evolution under both visible and NIR light without combining or hybridizing with other materials. Importantly, the difluorothiophene (ThF) π-linker facilitates the charge transfer between acceptors of different repeated moieties (~ A-D-A-(π-Linker)-A-D-A~) leading to enhancement of charge separation between D and A. As a result, the PITIC-ThF Pdots exhibit superior hydrogen evolution rates of 339.7 mmol g− 1 h− 1 (0.279 mol/h) and 4100 µmol g− 1 h− 1 (20.5 µmol/h) with visible (> 420 nm) and NIR (> 780 nm) light irradiation, respectively. Furthermore, PITIC-ThF Pdots exhibit a record-breaking apparent quantum yield (AQY) at 700 nm (4.76%).