Because of the special dimension effect and interface effect, thin film materials have unique advantages compared with bulk materials. It has been found that single-layer FeSe superconducting films grown on SrTiO₃ (STO) substrates significantly increase the superconducting transition temperature (T_c), which makes the study of FeSe superconducting films a new direction to understand the mechanism of unconventional superconductors. In this paper, the recent research achievements on the preparation of Fe(Se,Te) superconducting films and the enhancement of T_c by stress effect and interface effect are reviewed.