The invention belongs to the field of solar cells, and particularly relates to a solar cell module and a manufacturing method thereof. The solar cell module comprises multiple serially connected sub-cells. Each sub-cell comprises a base electrode, an electronic transmission layer, an optical active layer, a hole transmission layer and a top electrode successively from the bottom to the top. The polarities of any two adjacent sub-cells are opposite to each other on the serial connection circuit of the solar cell module. The base electrodes of any two adjacent sub-cells on the serial connectioncircuit are directly connected with each other or directly connected with the top electrodes. According to the invention, middle ineffective area used for connecting the sub-cells can be effectively reduced; space filling factors of the module are improved; meanwhile, contact resistance of upper and lower electrodes is eliminated; and performance of the cell is further improved. According to the invention, it is potentially possible to achieve highly-efficient large-area solar cells.