The invention provides a three-phase power signal sharing surge protector which comprises a power surge protector and a signal surge protector. According to the power surge protector, a voltage limiting type electronic component is arranged between each phase line and a neutral line, two ends of three voltage limiting type electronic components are provided with switch type components in parallel, and the common output end of the three voltage limiting type electronic components are also provided with a switch component. According to the signal surge protector, a switch type component is arranged between two signal lines, and a transient suppression diode is arranged between the two signal lines. When the three-phase power signal sharing surge protector is stricken by lightning, thus a conduction circuit is in a short circuit, the equipotential of two ends is realized, lightning current is avoided from entering into protection equipment, and the three-phase power signal sharing surge protector prevents the lightning current from a three-phase power line or signal line from directly entering into protected equipment.