The work aims to study the influence of the morphology of CaCO3 pigment particles on the performance of inkjet printing coatings. Different calcium carbonate pigment particles were prepared by changing the type of dispersant, and the prepared pigment particles were characterized by scanning electron microscopy (SEM), Fourier transform infrared spectrometer (FT-IR) and particle size analyzer. The effects of dispersant type on the morphology and particle size of pigment were studied. Four types of calcium carbonate with different morphology were used as pigments and they were applied in the surface coating of inkjet printing paper. The dynamic permeability, physical properties and inkjet printing performance of the coated paper were tested. CMC used as a dispersant aided in the formation of spherical calcium carbonate pigment particles with a uniform particle size distribution; the spindle-shaped calcium carbonate pigment particles helped to improve the smoothness and gloss of the coated paper; the spherical calcium carbonate pigment particles helped to improve the inkjet printing performance and permeability of coated paper; and the uniformity of the particle size distribution of the pigment particles had a greater influence on the dynamic permeability of the coated paper, and the influence thereof exceeded the influence of the morphology of the pigment particles on the permeability of the coated paper. The spherical calcium carbonate pigment particles with uniform particle size distribution are most suitable for the inkjet printing coating and can improve the physical properties, printing performance and dynamic permeability of the paper.