Testing machine to perform a plurality of measurements and tests on a film made of plastics in order to determine mechanical and physical properties of said film, comprising: - a basic structure provided with a supporting plane; - an unwinding station supported by said supporting plane and provided with an unwinding roller driven and/or controlled in rotation about a respective longitudinal axis by first driving means and arranged to support a reel of said film; - a pre-stretching station supported by said supporting plane and arranged to unwind said film from said reel with a preset unwinding speed and to pre-stretch said film of a preset percentage, said pre-stretching station comprising a couple of pre-stretching rollers (41; 42) driven in rotation about respective longitudinal axes by second driving means (43, 44) and a plurality of return rollers (45, 46; 47) to deviate and wrap said film on said pre-stretching rollers (41, 42) according to a predetermined pre-stretching path, said pre-stretching rollers (41, 42) and said return rollers (45, 46, 47) being interchangeable, in particular with pre-stretching rollers and return rollers having different diameter, and adjustably positioned to change said pre-stretching path; - a wrapping station supported by said supporting plane and provided with a testing drum driven and/or controlled in rotation about a respective longitudinal axis by third driving means and arranged to be wrapped at least partially by said film coming out from said pre-stretching station; - a plurality of guiding rollers to lead said film along an unwinding path from said unwinding station to said pre-stretching station and from the latter to said wrapping station, said guiding rollers being interchangeable, in particular with guiding rollers having different diameter, and reversibly and adjustably mounted on said supporting plane to change said unwinding path; - a plurality of measuring groups to perform a plurality of respective measurements at least of dimensional and/or physical parameters of said reel and of said film and reversibly and adjustably mounted on said supporting plane depending on said unwinding path; - a plurality of testing groups provided with respective means arranged to interact with said film to perform respective tests and measurements on said film in order to determine mechanical and physical properties of the latter; wherein said supporting plane comprises a plurality of mounting holes mutually spaced, in particular with a predetermined pitch and along two orthogonal directions, to reversibly and adjustably mount said guiding rollers and said measuring groups. - a basic structure provided with a supporting plane; - an unwinding station supported by said supporting plane and provided with an unwinding roller driven and/or controlled in rotation about a respective longitudinal axis by first driving means and arranged to support a reel of said film; - a pre-stretching station supported by said supporting plane and arranged to unwind said film from said reel with a preset unwinding speed and to pre-stretch said film of a preset percentage, said pre-stretching station comprising a couple of pre-stretching rollers (41; 42) driven in rotation about respective longitudinal axes by second driving means (43, 44) and a plurality of return rollers (45, 46; 47) to deviate and wrap said film on said pre-stretching rollers (41, 42) according to a predetermined pre-stretching path, said pre-stretching rollers (41, 42) and said return rollers (45, 46, 47) being interchangeable, in particular with pre-stretching rollers and return rollers having different diameter, and adjustably positioned to change said pre-stretching path; - a wrapping station supported by said supporting plane and provided with a testing drum driven and/or controlled in rotation about a respective longitudinal axis by third driving means and arranged to be wrapped at least partially by said film coming out from said pre-stretching station; - a plurality of guiding rollers to lead said film along an unwinding path from said unwinding station to said pre-stretching station and from the latter to said wrapping station, said guiding rollers being interchangeable, in particular with guiding rollers having different diameter, and reversibly and adjustably mounted on said supporting plane to change said unwinding path; - a plurality of measuring groups to perform a plurality of respective measurements at least of dimensional and/or physical parameters of said reel and of said film and reversibly and adjustably mounted on said supporting plane depending on said unwinding path; - a plurality of testing groups provided with respective means arranged to interact with said film to perform respective tests and measurements on said film in order to determine mechanical and physical properties of the latter;