Abstract: Flexible strain sensor has great potential in medical industry, health care and robotics, etc. However, most flexible strain sensors reported only output electrical signal (e.g. resistance, current and capacitance) in response to external strain, and lack direct notice of external loading, restricting their applications in early warning and health care, etc. In this work, we produced a flexible color-changeable strain sensor by using the silver nanowire (AgNW)/silicone composite film as the transparent electrode and polyacrylamide organogel as the electrochromic component. In addition to the excellent flexibility and moderate strain sensing performance (strain sensitivity of 0.07), the senor obtained has a reversible color transformation in response to external strain via the electrochromic effect. In virtue of these advantages mentioned above, the current sensor has broad applications in interactive wearable devices, electronic skin, anti-counterfeiting, artificial prosthetics and intelligent robots.