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Interfacial charge separation is an essential issue to restrict catalytic activity of photocatalysts. In this work, we report a promising and easy-to-handle strategy to modulate the activity of a C 60 -based photocatalyst (C 60 @Pt) for visible-light-driven hydrogen evolution reaction (HER) with the coupling of magnetic substance that had weak ferromagnetism (Fe 3 O 4 microbeads as an instance). It is found that Fe 3 O 4 microbeads played a pivotal role in boosting photocatalytic activity and apparent quantum efficiency of C 60 @Pt for visible-light-driven HER, as the weak local magnetic field it induced around C 60 @Pt contributed to facilitating the separation of photo electrons from electron-donor in reaction system. This work shows a promising strategy to enhance photocatalytic activity of C 60 -based photocatalyst (C 60 @Pt as an instance) for visible-light-driven hydrogen evolution by coupling it with magnetic substance Fe 3 O 4 microbeads that had weak ferromagnetism. It is found that the Fe 3 O 4 microbeads played a pivotal role in enhancing photocatalytic activity of C 60 @Pt as the weak local magnetic field it induced around C 60 @Pt contributed to promoting the separation of photo-excited electrons from electron-donor. This strategy effectively boosted hydrogen evolution rate and AQE of C 60 @Pt. [Display omitted] • Modulate activity of C 60 -based photocatalyst via connecting weak magnetic substance. • Promote separation of photo-excited electrons by inducing weak local magnetic field. • AQE was boosted up to 2.5 times with the coupling of weak magnetic substance. • Hydrogen evolution improved up to 3.7 times when connecting weak magnetic substance. • Remarkably improve HER photocatalytic robustness of C 60 -based photocatalyst. [ABSTRACT FROM AUTHOR]