The present disclosure relates to an array substrate and the manufacturing method thereof. The manufacturing method includes the steps including: forming a buffer layer on a substrate, forming a source and a data line within the buffer layer, and forming a gate and a gate line on the buffer layer, forming an insulation layer on the source, the data line, the gate, and the gate line, forming a semiconductor layer on the source, and forming a first pixel electrode and a second pixel electrode on the insulation layer. The manufacturing efficiency of the manufacturing process of the array substrate is high, and the manufacturing process is also energy saving.