The invention provides a power generation apparatus based on a crowd load in public transport means. The power generation apparatus comprises a piezoelectric energy capturing apparatus distributed in a bottom plate of the public transport means, wherein the piezoelectric energy capturing apparatus comprises one or more piezoelectric structural units; the piezoelectric structural units comprise arc-shaped steel plates; multiple piezoelectric sheets are arranged at the bottoms of the corresponding arc-shaped steel plates; extension slits are formed in the two ends of the piezoelectric energy capturing apparatus; and the piezoelectric energy capturing apparatus is connected to a power supply control apparatus through a wire so as to output electric energy. By adoption of the power generation apparatus, damage to the public transport means can be reduced while the service life of the public transport means is prolonged; and in addition, self-generated electric energy supply also can be obtained, so that waste of energy is reduced, and huge economic benefit is obtained.