The invention discloses a roller-convexity flexible regulation and control roller with an electronic temperature control function. The roller comprises a roller body with a through hole, electronic temperature control rings, a distance ring, a cooling pipeline, a slip ring, a temperature sensor and a temperature detection and control assembly, wherein the electronic temperature control rings are arranged in an axial through hole of the roller body, and are supplied power independently through the slip ring to generate local cold ends or hot ends on the hole wall of the central through hole ofthe roller body, so that a corresponding local negative convexity or local positive convexity is generated, the cold ends and the hot ends can be used in cooperation to form a circulation loop, and astrong axial heat transfer limit function is achieved. Compared with the prior art, the roller has stronger local plate shape regulation capability, and can solve the roller shape fluctuation problemcaused by excessive transmission of the temperature in the roller.