The content of optical texture and the comprehensive thermal properties of coke under the condition of variable temperature constant temperature were detected by polarizing microscope and the self-developed coke comprehensive thermal properties testing device, respectively. The results show that there is a parabolic relationship between OTI, which represents the comprehensive anisotropy degree index of optical texture, and Ti , the initial reaction temperature, CRR25 , the average dissolution rate, and CSR25 , which is the comprehensive thermal performance index characterizing the dissolution loss behavior. The initial reaction temperature Ti and the average dissolution rate CRR25 of coke with moderate anisotropy are lower, and the strength after iso-solution reaction CSR25 is higher. The parabolic relationship between OTI and Ti and CRR25 has a singularity (J4 coke), which may be related to the limitations of the optical tissue measurement method. OTI index has a parabolic relationship with CPHTI, a comprehensive thermal performance index characterizing high temperature resistance, and an exponential increasing relationship with the intensity CPHTS after heat treatment, respectively. However, there are also singularity points (J4 and J5 coke), which may be related to the composition of the optical tissue itself and other factors such as stomata and minerals.