Abstract: The flat and smooth BaPbO3 thin film with a certain crystal orientation was prepared as a conductively isolated layer for YBCO coated conductors. In the experiment, a stably homogeneous precursor solution was obtained taking the barium acetate and lead acetate as solutes with propionic acid as solvent. Then, the precursor film was deposited on the monocrystalline LaAlO3 (100) substrate by spin-coating the solution, and a BaPbO3 thin film was prepared by sintering the precursor film at 650 °C for 30 min in oxygen atmosphere. The XRD patterns showed that the film is of single-phase BaPbO3 with a slight (100) orientation, and the SEM images revealed that the film is about 650 nm thick with a compact and homogeneous surface. The thin film resistance was measured by four-probe method at room temperature and the resistivity is about 1×10^-3 Ω·cm.