The embodiments of the present invention disclose an electrochromic display panel, a driving method thereof and a display device; the electrochromic display panel comprises: a first substrate and a second substrate arranged with box alignment; the first substrate being divided into a plurality of pixel units; a plurality of electrochromic strips made of a black electrochromic material are arranged in each pixel unit of the first substrate; a electrochromic layer made of the black electrochromic material is arranged on the second substrate; the black electrochromic material presents a transparent state when it is powered off, and presents a black state when it is powered on. The electrochromic display panel provided by the embodiment of the present invention realizes both color display and black display with one electrochromic material; compared with the prior art, the embodiment of the present invention has advantages of low cost, stable luminous efficiency and simple driving mode.