A substation frame , comprising: at least two supporting assemblies arranged at intervals along a first direction, wherein all the supporting assemblies comprise a first supporting part and a second supporting part that are connected to each other; and a beam assembly provided between two adjacent supporting assemblies and comprising two ends, and flange assemblies provided between the supporting assemblies and the ends of the beam assembly , wherein an end of the supporting assemblies and an end of the beam assembly are respectively connected to the flange assemblies ; wherein the first supporting part is located between the beam assembly and the second supporting part , wherein the first supporting part is made of composite insulating material and wherein the beam assembly either; (i) is made of composite insulating material, or (ii) comprises an intermediate segment and edge segments disposed at both ends of the intermediate segment , wherein the edge segments are made of composite insulating material, and the intermediate segment is made of metal material; characterized in that : the second supporting part is made of metal material; the substation frame further comprises a first attachment plate provided at a connection position between the beam assembly and the flange assemblies , wherein the first attachment plate is provided with a first wire attaching hole for attaching a conducting wire. at least two supporting assemblies arranged at intervals along a first direction, wherein all the supporting assemblies comprise a first supporting part and a second supporting part that are connected to each other; and a beam assembly provided between two adjacent supporting assemblies and comprising two ends, and flange assemblies provided between the supporting assemblies and the ends of the beam assembly , wherein an end of the supporting assemblies and an end of the beam assembly are respectively connected to the flange assemblies ; wherein the first supporting part is located between the beam assembly and the second supporting part , wherein the first supporting part is made of composite insulating material and wherein the beam assembly either; (i) is made of composite insulating material, or (ii) comprises an intermediate segment and edge segments disposed at both ends of the intermediate segment , wherein the edge segments are made of composite insulating material, and the intermediate segment is made of metal material; (i) is made of composite insulating material, or (ii) comprises an intermediate segment and edge segments disposed at both ends of the intermediate segment , wherein the edge segments are made of composite insulating material, and the intermediate segment is made of metal material; characterized in that : the second supporting part is made of metal material; the substation frame further comprises a first attachment plate provided at a connection position between the beam assembly and the flange assemblies , wherein the first attachment plate is provided with a first wire attaching hole for attaching a conducting wire. the second supporting part is made of metal material; the substation frame further comprises a first attachment plate provided at a connection position between the beam assembly and the flange assemblies , wherein the first attachment plate is provided with a first wire attaching hole for attaching a conducting wire. <EOS>