A building-block-combined-type high power transformer, comprising: a first iron core body being a polygon in shape and having a first side wing part on both sides respectively thereof where both ends of the first side wing part are circular in shape with a first radius of curvature "r1", and a first open channel is formed between the two first side wing part; a second iron core body being a polygon in shape and having a second side wing part on both sides respectively thereof where both ends of the second side wing parts are circular in shape with a second radius of curvature "r2", and a second open channel is formed between the two second side wing part, the second iron core body being in contact side-by-side with the first iron core body; a plurality of first circular shaped conductive strip bodies and second circular shaped conductive strip bodies each having an open hole and a guided channel between the respective end parts of the circular shaped conductive strip bodies (2a, 2b) and both of them being positioned in both of the first open channel and the second open channel where the open hole has a first side, a second side which is on the opposite side of the first side, a third side, and a fourth side which is on the opposite side of the third side and the open hole contains the first side wing part and the second side wing part; the two end parts of the first and the second circular shaped conductive strip bodies (2a, 2b) comprising the guided channels being positioned on the second side of the open holes between a respective pole lead of the first and second circular shaped conductive strip bodies (2a, 2b) on both sides of thereof; a central axis x-x is positioned from the midpoint of the second side extended straightly to the midpoint of the first side which is on the opposite side of second side, the second circular shaped conductive strip bodies are formed by flipping over the first circular shaped conductive strip bodies with a 180-degree angle with respect to a central axis x-x; and a plurality of isolating bodies being annular in shape and being positioned in between the first circular shaped conductive strip bodies and the second circular shaped conductive strip bodies have a through hole corresponding to the open hole in order to contain the first side wing part and the second side wing part; whereby, the building-block-combined-type high power trans -former having the plurality of first circular shaped conductive strip bodies alternately stack up with the plurality of second circular shaped conductive strip bodies to position on the first side wing part and the second side wing part respectively forming the first open channel and the second open channel correspond respectively to at least two guided channels in order to provide a connection of the pole leads to various circuit layouts. a first iron core body being a polygon in shape and having a first side wing part on both sides respectively thereof where both ends of the first side wing part are circular in shape with a first radius of curvature "r1", and a first open channel is formed between the two first side wing part; a second iron core body being a polygon in shape and having a second side wing part on both sides respectively thereof where both ends of the second side wing parts are circular in shape with a second radius of curvature "r2", and a second open channel is formed between the two second side wing part, the second iron core body being in contact side-by-side with the first iron core body; a plurality of first circular shaped conductive strip bodies and second circular shaped conductive strip bodies each having an open hole and a guided channel between the respective end parts of the circular shaped conductive strip bodies (2a, 2b) and both of them being positioned in both of the first open channel and the second open channel where the open hole has a first side, a second side which is on the opposite side of the first side, a third side, and a fourth side which is on the opposite side of the third side and the open hole contains the first side wing part and the second side wing part; the two end parts of the first and the second circular shaped conductive strip bodies (2a, 2b) comprising the guided channels being positioned on the second side of the open holes between a respective pole lead of the first and second circular shaped conductive strip bodies (2a, 2b) on both sides of thereof; a central axis x-x is positioned from the midpoint of the second side extended straightly to the midpoint of the first side which is on the opposite side of second side, the second circular shaped conductive strip bodies are formed by flipping over the first circular shaped conductive strip bodies with a 180-degree angle with respect to a central axis x-x; and a plurality of isolating bodies being annular in shape and being positioned in between the first circular shaped conductive strip bodies and the second circular shaped conductive strip bodies have a through hole corresponding to the open hole in order to contain the first side wing part and the second side wing part;