The effect of attention field (AF) is not only constrained to spatial positions of attention but also to size. However, the direct link of AF size to receptive field (RF) has not been well established. In our study, we demonstrated remarkable modulation of AF in the early visual cortex, with regard to size and location of population receptive field (pRF), emphatically. Specially, the differences in pRF size between focused and distributed attention conditions increase with eccentricity, especially in the V3 area. Considering pRF location, eccentricity is larger under distributed attention conditions than under focused attention conditions at the perifovea in the V3 area.