Disclosed are an electrical penetration member, a manufacturing method therefor, and an electrical penetration device, which relate to the technical field of electrical penetration. The electrical penetration member comprises sealing glass (5), an outer pipe (4) and a conductor (7) inserted into the outer pipe (4), wherein two ends of the outer pipe (4) are both blocked by supporting fixing blocks (8), and two ends of the conductor (7) respectively extend out of the corresponding supporting fixing blocks (8). The sealing glass (5) is sintered between the conductor (7) and the outer pipe (4). The sealing glass (5) divides an annular cavity, which is jointly enclosed by the conductor (7), the outer pipe (4) and the supporting fixing blocks (8), into two cavities: an upper cavity and a lower cavity. An optical fiber (14) penetrates the sealing glass (5); at least one end of the optical fiber (14) is connected to an optical fiber connector (3) after extending out of the corresponding supporting fixing block (8); and a portion of the optical fiber (14) that is located in the sealing glass (5) is engraved with an optical fiber Bragg grating to form a first optical fiber Bragg grating sensor (1). By utilizing the first optical fiber Bragg grating sensor (1) to monitor the strain and the temperature of the sealing glass (5) in real time, not only is it possible to judge whether the electrical penetration member meets the requirements for gas tightness, the sintering temperature can also be accurately controlled.