Multi-pass ink-jet printing is one of the main ways to improve the efficiency of solar cells. However, grid line width broadening is one of the difficult points of the technology. In order not to increase the cost of printing materials and grid line resistance, multi-pass ink-jet printing process with variable volume ink drops was put forward. Printed silicon-based solar cell using this process is to improve the energy conversion efficiency of solar cells, mainly by reducing the grid lines width of solar cells.