A protection module for total or partial protection of a row of fruit trees, wherein said module comprises: - a support structure (11, 12) comprising a first upright and a second upright anchored to the ground so as to be spaced along a reference direction corresponding to the direction along which said row develops; - a drum supported by said uprights (11, 12) so as to occupy a position above said trees of said row; - drive means configured to rotate said drum in both possible directions of rotation; - at least one first covering element and at least one second cover element fixed to said drum for winding around, or unwinding from, said drum according to its direction of rotation; - a first guiding assembly and a second guiding assembly 32) supported respectively by said first upright and by said second upright, wherein said guiding assemblies (31,32) are operatively connected to said covering elements (20A, 20B) to guide them, during the rotation of said drum, between a first reference position and a second reference position, on opposite sides with respect to a vertical reference plane containing the longitudinal axis of said drum, said reference positions being characteristic, respectively, of a non-covering condition and of a covering condition of said trees of said row, characterized in that each of said guide assemblies (31, 32) comprises: - a pair of guide arms (11', 11"- 12', 12") connected to a corresponding of said uprights (11, 12) so as to be mirrored with respect to said vertical reference plane; - a pair of carriages (11-A, 11-B, 12-A, 12-B) each of which is slidingly coupled to a corresponding guide arm (11', 11"- 12', 12"), a first carriage (11A-12A) being connected, directly or indirectly, to said first covering element, a second carriage (11B, 12B) being connected, directly or indirectly, to said second covering element; - a driving mechanism of said carriages (11-A, 11-B, 12-A, 12-B) causing them to slide along the corresponding guide arms (11', 11", 12"), wherein said sliding is synchronised with the rotation of said drum so that said carriages (11-A, 11-B, 12-A, 12-B) move towards said vertical reference plane when said drum rotates in a direction that determines the winding of said covering elements (20A, 20B), and away from said vertical reference plane when said drum rotates in the opposite direction. - a support structure (11, 12) comprising a first upright and a second upright anchored to the ground so as to be spaced along a reference direction corresponding to the direction along which said row develops; - a drum supported by said uprights (11, 12) so as to occupy a position above said trees of said row; - drive means configured to rotate said drum in both possible directions of rotation; - at least one first covering element and at least one second cover element fixed to said drum for winding around, or unwinding from, said drum according to its direction of rotation; - a first guiding assembly and a second guiding assembly 32) supported respectively by said first upright and by said second upright, wherein said guiding assemblies (31,32) are operatively connected to said covering elements (20A, 20B) to guide them, during the rotation of said drum, between a first reference position and a second reference position, on opposite sides with respect to a vertical reference plane containing the longitudinal axis of said drum, said reference positions being characteristic, respectively, of a non-covering condition and of a covering condition of said trees of said row, - a pair of guide arms (11', 11"- 12', 12") connected to a corresponding of said uprights (11, 12) so as to be mirrored with respect to said vertical reference plane; - a pair of carriages (11-A, 11-B, 12-A, 12-B) each of which is slidingly coupled to a corresponding guide arm (11', 11"- 12', 12"), a first carriage (11A-12A) being connected, directly or indirectly, to said first covering element, a second carriage (11B, 12B) being connected, directly or indirectly, to said second covering element; - a driving mechanism of said carriages (11-A, 11-B, 12-A, 12-B) causing them to slide along the corresponding guide arms (11', 11", 12"), wherein said sliding is synchronised with the rotation of said drum so that said carriages (11-A, 11-B, 12-A, 12-B) move towards said vertical reference plane when said drum rotates in a direction that determines the winding of said covering elements (20A, 20B), and away from said vertical reference plane when said drum rotates in the opposite direction.