The invention discloses a dry-type electric transformer and belongs to the field of power equipment.A connecting column is arranged at the low-voltage output end of the dry-type electric transformer, part of the connecting column is embedded into the low-voltage output end and is in interference fit with the low-voltage output end, the connecting column is provided with a first conductive columnar part in interference fit with a power busbar, a second conductive columnar part is coaxially arranged in the first columnar part, the first columnar part and the second columnar part are in interference fit, and the thermal coefficient of expansion of the second columnar part is larger than that of the first columnar part.The transformer has the advantages that a larger conductive area is generated by the same lap joint length, then the current density is reduced, and low temperature rise of the low-voltage output end is achieved; the use number of busbars is reduced, and resources are saved; the electrical clearanc
