The invention provides a stepless adjustable skin stapler, and belongs to the apparatus for operation. The stepless adjustable skin stapler comprises a block shaped double sticky tape. The stepless adjustable skin stapler is characterized by further comprising a flexible wire, a main pull buckle, a secondary pull buckle, a hook and loop fastener connected to the end of the flexible wire, a fabric piece used for fixing or releasing the hook and loop fastener, and release paper, wherein the main pull buckle and the secondary pull buckle are respectively composed of a main adhering piece, a secondary adhering piece, a main pull buckle column and a secondary pull buckle column; the other end of the flexible wire, connected with the hook and loop fastener, is fixed on the neck of the secondary pull buckle. The test result shows that the stepless adjustable skin stapler meets the demand on opening a stapled wound and also realizes continuous fine adjustment of wound stapling force, thus the potential risk that the wound healing is seriously influenced by excessive tightening, staggering of skins in both sides of the wound, and non-uniform stressing on different parts of a nonlinear wound during stapling can be avoided; the blood microcirculation of the wound skin is prompted, the wound is sped up to heal, and the wound healing period is reduced from 11 to 12 days in the prior art to 8 to 9 days, which is close to the healing period of the wound stapled with the traditional medicinal needle and line.