A method for installing a panel based on a screw-in back bolt, wherein the screw-in back bolt comprises a back bolt sleeve and a limit screw, a front part of the back bolt sleeve is an expandable portion configured for being spread by the limit screw, the limit screw is configured for being screwed in from a rear end of the back bolt sleeve until the limit screw is locked, and the expandable portion of the back bolt sleeve is provided with a first conical surface and a second conical surface, wherein the method comprises: step A: drilling an anchor bolt hole in a back of the panel; step B: injecting an adhesive into the anchor bolt hole; step C: placing an back bolt sleeve of the back bolt into the anchor bolt hole; and step D: screwing a limit screw of the back bolt into the back bolt sleeve so that the back bolt sleeve is spread; wherein, the step A comprises: step A1: drilling a straight hole in the back of the panel; and step A2: expanding a bottom of the straight hole into a counterbore, wherein, the counterbore has a pressure-bearing surface configured for locking the spread back bolt sleeve in an axial direction; wherein, the counterbore is only configured for locking the spread back bolt sleeve in the axial direction; characterized in that, the first conical surface is clamped inside the pressure-bearing surface to lock the spread back bolt sleeve in the axial direction, and the second conical surface is matched with the adhesive to firmly connect the spread back bolt sleeve and the anchor bolt hole in circumferential and radial directions. step A: drilling an anchor bolt hole in a back of the panel; step B: injecting an adhesive into the anchor bolt hole; step C: placing an back bolt sleeve of the back bolt into the anchor bolt hole; and step D: screwing a limit screw of the back bolt into the back bolt sleeve so that the back bolt sleeve is spread; wherein, the step A comprises: step A1: drilling a straight hole in the back of the panel; and step A2: expanding a bottom of the straight hole into a counterbore, wherein, the counterbore has a pressure-bearing surface configured for locking the spread back bolt sleeve in an axial direction; wherein, the counterbore is only configured for locking the spread back bolt sleeve in the axial direction; characterized in that, the first conical surface is clamped inside the pressure-bearing surface to lock the spread back bolt sleeve in the axial direction, and the second conical surface is matched with the adhesive to firmly connect the spread back bolt sleeve and the anchor bolt hole in circumferential and radial directions. step A1: drilling a straight hole in the back of the panel; and step A2: expanding a bottom of the straight hole into a counterbore, wherein, the counterbore has a pressure-bearing surface configured for locking the spread back bolt sleeve in an axial direction; wherein, the counterbore is only configured for locking the spread back bolt sleeve in the axial direction; characterized in that, the first conical surface is clamped inside the pressure-bearing surface to lock the spread back bolt sleeve in the axial direction, and the second conical surface is matched with the adhesive to firmly connect the spread back bolt sleeve and the anchor bolt hole in circumferential and radial directions.