An adjusting base for door closer , comprising: a fixing member configured to be fixed to a surface, wherein an upper surface of the fixing member is arranged with at least one protrusion ; an adjusting member arranged on the upper surface of the fixing member in an adjustable manner, and configured to be connected to a door closer , wherein the adjusting member is formed with at least one adjusting hole for receiving the at least one protrusion ; and at least one adjusting unit movably arranged on the adjusting member and configured to abut against the at least one protrusion to adjust a relative position between the adjusting member and the fixing member ; characterized in that the at least one protrusion comprises a first protrusion and a second protrusion , the at least one adjusting hole comprises a first adjusting hole configured to receive the first protrusion and a second adjusting hole configured to receive the second protrusion , and wherein the at least one adjusting unit comprises: a plurality of first adjusting units movably arranged on the adjusting member and configured to abut against the first protrusion to adjust a relative position between the first protrusion and the first adjusting hole ; and a plurality of second adjusting units movably arranged on the adjusting member and configured to abut against the second protrusion to adjust a relative position between the second protrusion and the second adjusting hole . a fixing member configured to be fixed to a surface, wherein an upper surface of the fixing member is arranged with at least one protrusion ; an adjusting member arranged on the upper surface of the fixing member in an adjustable manner, and configured to be connected to a door closer , wherein the adjusting member is formed with at least one adjusting hole for receiving the at least one protrusion ; and at least one adjusting unit movably arranged on the adjusting member and configured to abut against the at least one protrusion to adjust a relative position between the adjusting member and the fixing member ; characterized in that the at least one protrusion comprises a first protrusion and a second protrusion , the at least one adjusting hole comprises a first adjusting hole configured to receive the first protrusion and a second adjusting hole configured to receive the second protrusion , and wherein the at least one adjusting unit comprises: a plurality of first adjusting units movably arranged on the adjusting member and configured to abut against the first protrusion to adjust a relative position between the first protrusion and the first adjusting hole ; and a plurality of second adjusting units movably arranged on the adjusting member and configured to abut against the second protrusion to adjust a relative position between the second protrusion and the second adjusting hole . a plurality of first adjusting units movably arranged on the adjusting member and configured to abut against the first protrusion to adjust a relative position between the first protrusion and the first adjusting hole ; and a plurality of second adjusting units movably arranged on the adjusting member and configured to abut against the second protrusion to adjust a relative position between the second protrusion and the second adjusting hole . <EOS>