Ferroelectric Pb1-xLax(Zr1-y,Tiy)1-x/4O3 thin films have excellent ferroelectric, dielectric, piezoelectricity and pyroelectricity properties, and a promising application prospect in the field of microelectronics. The research backgrounds, basic structures, preparation methods, characterizations of thin film properties, development of researches and applications are summarized in this article. The several important problems of the current researches of Pb1-xLax(Zr1-y,Tiy)1-x/4O3 thin films are also discussed in detail based on the acquired research results. ?(From Journal of Synthetic Crystals)