  Motivated by experimental realizations of integer quantized charge pumping in
one-dimensional superlattices~[Nat. Phys. 12, 350 (2016); Nat. Phys. 12, 296
(2016)], we generalize and propose the adiabatic pumping of a fractionalized
charge in interacting bosonic systems. This is achieved by dynamically sweeping
the modulated potential in a class of one-dimensional interacting systems. As
concrete examples, we show the charge pumping of interacting bosons at certain
fractionally occupied fillings. We find that, for a given ground state, the
charge pumping in a complete potential cycle is quantized to the fractional
value related to the corresponding Chern number, characterized by the motion of
the charge polarization per site. Moreover, the difference between charge
polarizations of two ground states is quantized to an intrinsic constant
revealing the fractional elementary charge of quasiparticle.
