The invention relates to a wire fixing device and fixing method of a pin porcelain insulator. Currently, wire fixing of the pin porcelain insulator employs a binding mode through a binding wire, time and labor are wasted, and materials such as the binding wires are wasted. The wire fixing device comprises two clamps (1), the two clamps are semicircular, one end of each clamp is provided with an installation block (9), the installation blocks of the two clamps are fixedly connected through a bolt, the other ends of the two clamps are connected through a rotating shaft (2), the middle position of each clamp is provided with a fixing block (5), a wire briquetting (6) is buckled to the fixing block and is connected with the fixing block through a bolt, the fixing block and the wire briquetting are both provided with grooves (7), and the grooves are semicircular. The device and method can be used for the wire fixing device and fixing method of the pin porcelain insulator.