The invention discloses a winding and lead structure capable of increasing the smelting range of a submerged arc furnace transformer. The winding and lead structure comprises a fine regulating winding, a coarse regulating winding, a basic winding and a low-voltage winding which are sequentially arranged outside the iron core of the submerged arc furnace transformer from inside to outside and is characterized in that the fine regulating winding, the coarse regulating winding and the basic winding for a high-voltage winding unit, the tail end of the coarse regulating winding and the tail end ofthe basic winding are connected and led out, the guide-out end, a coarse regulating winding end and a fine regulating winding end are connected to the tap of a middle-voltage-regulating load-free voltage regulating switch through leads, the load-free voltage regulating switch is used to switch the connection between the fine regulating winding end and the coarse regulating winding end or tail endto allow the basic winding to be connected or disconnected with the coarse regulating winding so as to change the effective number of turns of the high-voltage winding, and two different secondary output voltage combinations can be acquired through the regulation of the fine regulating winding. By the arrangement, the winding and lead structure has the advantages that the voltage requirements forthe smelting of two different products can be satisfied, and the investment cost and risk of a user are lowered.