An integrated self-opening and self-closing stairs-climbing trolley case is provided. The integrated self-opening and self-closing stairs-climbing trolley case includes a case body, wherein a bottom of the case body is provided with universal wheels, a telescopic draw bar is arranged on a side of the case body, a bottom of a sliding plate is provided with unidirectional wheels, an inner bracket is respectively connected with the telescopic draw bar and the case body, limiting connecting rods on left and right sides are movably connected with the inner bracket via a first connecting rod and are movably connected with the sliding plate via a second connecting rod, torsional spring connecting rods on the left and right sides are movably connected with the inner bracket via a third connecting rod and are movably connected with the sliding plate via a fourth connecting rod.