By integrating a large amount of RNA sequencing data, we identified VCL, FLNA, TAGLN, ACTA2, COL6A2, and CALD1 as potential biomarkers for B-cell-associated bladder cancer, and experimentally verified that these markers were significantly lower in bladder cancer patients than in the normal group, and were effective in predicting the survival rate of the patients and the status of the tumor immune microenvironment. This evidence concerns the gene COL6A2 and urinary bladder carcinoma.