An electrode structure, applied to a solar cell, comprising: a plurality of pairs of sub-busbars each comprising two sub-busbars extending along a first direction and arranged opposite to each other along a second direction intersecting with the first direction, wherein, for each pair of sub-busbars, each of the sub-busbars includes first sub-portions and second sub-portions, two first sub-portions each arranged on a respective sub-busbar of the pair of sub-busbars are spaced at a first interval along the second direction, and two second sub-portions each arranged on a respective sub-busbar of the pair of sub-busbars are spaced at a second interval along the second direction, fingers extending along the second direction and arranged at two sides of each pair of sub-busbars, wherein the fingers are connected to the sub-busbars, and electrode pads for connecting a solder strip, the electrode pads being sandwiched between the first sub-portions arranged on a respective sub-busbar of each pair of sub-busbars and connected to the first sub-portions, wherein the first interval between the first sub-portions arranged on a respective sub-busbar of a pair of sub-busbars is greater than the second interval between the second sub-portions arranged on a respective sub-busbar of the pair of sub-busbars, wherein connecting end portions for connecting a solder strip are provided at two ends of each of the sub-busbars, the connecting end portions are connected to first sub-portions, and for the connecting end portions and the first sub-portions that are connected to each other, widths of the connecting end portions in the second direction gradually decrease along a direction from the first sub-portions pointing to the connecting end portions, and/or the connecting end portions are connected to second sub-portions, and for the connecting end portions and the second sub-portions that are connected to each other, widths of the connecting end portions in the second direction gradually decrease along a direction from the second sub-portions pointing to the connecting end portions. a plurality of pairs of sub-busbars each comprising two sub-busbars extending along a first direction and arranged opposite to each other along a second direction intersecting with the first direction, wherein, for each pair of sub-busbars, each of the sub-busbars includes first sub-portions and second sub-portions, two first sub-portions each arranged on a respective sub-busbar of the pair of sub-busbars are spaced at a first interval along the second direction, and two second sub-portions each arranged on a respective sub-busbar of the pair of sub-busbars are spaced at a second interval along the second direction, fingers extending along the second direction and arranged at two sides of each pair of sub-busbars, wherein the fingers are connected to the sub-busbars, and electrode pads for connecting a solder strip, the electrode pads being sandwiched between the first sub-portions arranged on a respective sub-busbar of each pair of sub-busbars and connected to the first sub-portions, wherein the first interval between the first sub-portions arranged on a respective sub-busbar of a pair of sub-busbars is greater than the second interval between the second sub-portions arranged on a respective sub-busbar of the pair of sub-busbars, wherein connecting end portions for connecting a solder strip are provided at two ends of each of the sub-busbars, the connecting end portions are connected to first sub-portions, and for the connecting end portions and the first sub-portions that are connected to each other, widths of the connecting end portions in the second direction gradually decrease along a direction from the first sub-portions pointing to the connecting end portions, and/or the connecting end portions are connected to second sub-portions, and for the connecting end portions and the second sub-portions that are connected to each other, widths of the connecting end portions in the second direction gradually decrease along a direction from the second sub-portions pointing to the connecting end portions.