We have synthesized polycrystalline bars of Pr0.7（Sr1-xCax）0.3MnO3（x=0，0.1，…，1）with a sol-gel method using citrate as an agent, and grown epitaxial thin films of Pr0.7（Sr1-xCax）0.3MnO3 on （100）-oriented substrates of SrTiO3 （ STO ） by using pulsed laser deposition （ PLD ）. We systemically investigated their lattice structures and electronic transport property. Both polycrystalline and film samples have orthorhombic lattice structure, and their electronic transport behaviors nicely follow a adiabatic small polaron model in high temperature paramagnetic phase when T is larger than the Curie temperature TC. All resistivity data have been fitted by the small polaron model. The fitted results of polycrystalline samples qualitatively agree with that of corresponding film samples. With increasing contents of Ca, polaron hopping energy Ehop increases monotoniccaly, and ρ0 first decreases, then increases. The above results indicate that electronic transport property of high quality polycrystalline samples is less influenced by lattice defects and grain boundaries which are abundant in low quality samples, such that intrinsic small polaron transport behavior can appear in the former.