Objective. This study was aimed to propose a new classification system for Chronic Symptomatic Osteoporotic Thoracolumbar fracture (CSOTF) based on the fractures radiographic characteristics. Meanwhile, the reliability was verified. Methods. We collected 368 cases of CSOTF in our hospital from January 2010 to June 2017 and systematically analyzed the imaging data of all patients to develop a new classification system. Imaging examinations included dynamic radiography, computed tomography scans and magnetic resonance imaging. The classification system is mainly composed of 5 types: I (dynamic stability type), II (dynamic instability type), III (spinal stenosis type), IV (kyphosis type), and V (mixed type). Ten investigators systematically studied and fully understood the classification system grading 40 cases on two occasions, examined 1 month apart. Kappa coefficients (κ) were calculated to determine intraobserver and interobserver reliability. Results. Among the 368 patients with CSOTF, type I was the largest, accounting for 56% of all patients. Type V was the least, accounting for 6% of all patients. According to the typing evaluation of 40 cases of CSOTF patients, the total kappa value of interobserver reliability was 0.83, indicating good consistency. The total kappa value of intraobserver reliability was 0.85, indicating that the same observer could understand the classification. The repeatability of the two rounds of assessment was good. Conclusions. In the CSOFT radiographic classification, we revised the imaging measurement methods especially the imaging evaluation for the stability of injured vertebra and segmental kyphosis. The results showed that the total kappa was 0.83 and 0.85, respectively. It was preliminarily proved that CSOFT radiographic classification was simple with good consistency and repeatability, and was convenient to clinical communication and observation.