 This paper presents an all-in-organic flexible temperature sensor made from MN Coenayo, MCNL, spinel structural ceramics film and a flexible 40 micrometer thick mica substrate. The authors were able to control the production process to obtain pure spinel phase MCNO slash mica films with low defect density. Additionally, the activation energy of the proposed flexible ceramic temperature sensor film remained stable in the natural bending state and at radii of curvature of 10, 15, and 20 millimeters, respectively. Furthermore, the sensitivity temperature coefficient of resistance value reached minus 3.9% C1, indicating that the proposed sensor has good stability and sensitivity. This article was authored by Yuxin Song, Shuo Wang, Bo Gao, and others.