A medical strap (10, 11), comprising: a first strip (101, 111) having opposingly arranged first surface (1013, 1113) and second surface (1015, 1115), a plurality of hooks (1011, 1111) being disposed on the first surface (1013, 1113), the second surface (1015, 1113) being a smooth surface; and a second strip (103, 113) having opposingly arranged third surface and fourth surface (1031, 1131), a floss (10373, 11373) being disposed on the third surface (1039, 1133), the fourth surface (1031, 1131) being a rough surface, wherein the floss (10373, 11373) on the third surface (1039, 1133) is hooked by the hooks on the first surface (1013, 1113) to join the first strip (101, 111) and the second strip (103, 113) together, and characterized wherein a region on the second strip (103, 113) is provided with two first parting lines (10303, 10303', 11361, 11361') and at least one second parting line (10301, 10301', 11303), the first parting lines (10303, 10303', 11361, 11361') are of the same length, parallel to the longitudinal direction of the second strip (103, 113), spaced apart by a distance, and respectively located on both sides of a central line of symmetry (109, 119) of the second strip (103, 113), the at least one second parting line (10301, 10301', 11363) is perpendicular to one of the first parting lines (10303, 10303', 11361, 11361'), such that at least one securing portion (1035, 1139, 1140) and at least two movable portions (1031, 1032, 1033, 1034, 1137, 1138) are formed in the region on the second strip (103, 113), and the movable portions (1031, 1032, 1033, 1034, 1137,1138) are respectively located on both sides of the at least one second parting line (10301, 10301', 11363). a first strip (101, 111) having opposingly arranged first surface (1013, 1113) and second surface (1015, 1115), a plurality of hooks (1011, 1111) being disposed on the first surface (1013, 1113), the second surface (1015, 1113) being a smooth surface; and a second strip (103, 113) having opposingly arranged third surface and fourth surface (1031, 1131), a floss (10373, 11373) being disposed on the third surface (1039, 1133), the fourth surface (1031, 1131) being a rough surface, wherein the floss (10373, 11373) on the third surface (1039, 1133) is hooked by the hooks on the first surface (1013, 1113) to join the first strip (101, 111) and the second strip (103, 113) together, and characterized wherein a region on the second strip (103, 113) is provided with two first parting lines (10303, 10303', 11361, 11361') and at least one second parting line (10301, 10301', 11303), the first parting lines (10303, 10303', 11361, 11361') are of the same length, parallel to the longitudinal direction of the second strip (103, 113), spaced apart by a distance, and respectively located on both sides of a central line of symmetry (109, 119) of the second strip (103, 113), the at least one second parting line (10301, 10301', 11363) is perpendicular to one of the first parting lines (10303, 10303', 11361, 11361'), such that at least one securing portion (1035, 1139, 1140) and at least two movable portions (1031, 1032, 1033, 1034, 1137, 1138) are formed in the region on the second strip (103, 113), and the movable portions (1031, 1032, 1033, 1034, 1137,1138) are respectively located on both sides of the at least one second parting line (10301, 10301', 11363).