Manufacturing method of electrochromic display panel and electrochromic display panel

The invention discloses a manufacturing method of an electrochromic display panel and the electrochromic display panel, the manufacturing method comprises the following steps: an array substrate is manufactured, the array substrate comprises a substrate, a driving layer and a pixel electrode layer which are stacked in sequence, and the pixel electrode layer comprises a plurality of sub-pixel electrode groups electrically connected with the driving layer; taking the plurality of sub-pixel electrode groups as working electrodes in sequence, and forming a plurality of electrochromic layers in one-to-one correspondence with the plurality of sub-pixel electrode groups through an electrochemical polymerization process; wherein the display colors of different electrochromic layers are different, when any one of the sub-pixel electrode groups is used as a working electrode, the working electrode is connected to a preset positive voltage, and the electrochromic layer is formed on the corresponding working electrode. A