The invention relates to flange processing machinery, in particular to a flange character rolling machine, which solves the problems of low mechanization degree and bad quality in lettering on the surface of the flange in the prior art. The flange character rolling machine comprises a machine frame; a guide frame is arranged on the machine frame and guide ways are arranged at two sides of the guide frame; a driving screw rod is arranged in the middle of the guide frame and a boosting frame is arranged on the guide frame; the guide way and the driving screw rod pass through the boosting frame, and the driving screw rod is sheathed with the boosting frame by screw thread; a character rolling device is arranged at one end of the machine frame, and comprises a motor below a platform, and two chain wheels connected via a chain are arranged on the platform; the chain is fixed with a plurality of chain pieces with type matrixes, wherein, one chain wheel is connected with the motor, a roof is arranged between the chain wheels and a bracket is arranged between the boosting frame and the chain wheels. The flange character rolling machine replaces the manual printing and has the advantages of clear writing, uniform depth and high efficiency.