The work aims to explore the effect of temperature change on the barrier and mechanical properties of several packaging composite films. Four kinds of different composite films were used as the research object. By adjusting the temperature, the tensile strength, elongation at break, puncture strength, right-angle tearing force, oxygen permeability and water vapor permeability of composite films were tested respectively. With the increase of temperature, the tensile strength, puncture strength and right-angle tearing force of composite films decreased gradually, the elongation at break increased firstly and then decreased, and the oxygen permeability and water vapor permeability increased gradually. When the temperature increased from 15 ℃ to 55 ℃, the mechanical properties and barrier properties of BOPP/EVOH composite film were less affected by temperature, with tensile strength decreasing by 5.2 MPa, elongation at break increasing by 10 %, puncture strength decreasing by 4.4 N, right-angle tearing force decreasing by 5.0 N, water vapor permeability increasing by 2.34 g/(m2.d), and oxygen permeability increasing by 12.5 cm³/(m2.d.0.1 MPa). According to the experimental research, the temperature is an important factor affecting the properties of packaging composite film and the research results provide guidance for the application of composite films in packaging field. The comprehensive properties of BOPP/EVOH composite film is least affected by temperature change.