An off-circuit tap changer, comprising: a switch base; and a rotation shaft penetrating the switch base characterized in that an upper end of the rotation shaft is connected to an operation positioning device, a lower end of the rotation shaft is disposed with moving contacts, and fixed contacts corresponding to the moving contacts are circumferentially disposed at a spacing on the switch base; the moving contacts are radial elastic rolling moving contacts, and the radial elastic rolling moving contacts span between two adjacent fixed contacts and closely contact the fixed contacts; characterised in that the radial elastic rolling moving contact comprises one of the following: - a roller moving contact disposed in a stopping cavity of the rotation shaft, a radial elastic pin being arranged at an inner side of the roller moving contact and the roller moving contact directly contracting the end of the radial elastic pin-, an outer side of the roller moving contact fitting with the fixed contact and directly contacts the fixed contact; - an annular moving contact being sleeved outside a radial elastic pin, the radial elastic pin being connected to the rotation shaft, an inner ring of the annular moving contact fitting with the radial elastic pin and directly contacting the end of radial elastic pin, a periphery of the annular moving contact fitting with the fixed contact and directly contacting the fixed contact; and in that the radial elastic pin comprises a pin disposed in a radial pin socket and a spring sleeved outside the pin. a switch base; and a rotation shaft penetrating the switch base characterized in that an upper end of the rotation shaft is connected to an operation positioning device, a lower end of the rotation shaft is disposed with moving contacts, and fixed contacts corresponding to the moving contacts are circumferentially disposed at a spacing on the switch base; the moving contacts are radial elastic rolling moving contacts, and the radial elastic rolling moving contacts span between two adjacent fixed contacts and closely contact the fixed contacts; characterised in that the radial elastic rolling moving contact comprises one of the following: - a roller moving contact disposed in a stopping cavity of the rotation shaft, a radial elastic pin being arranged at an inner side of the roller moving contact and the roller moving contact directly contracting the end of the radial elastic pin-, an outer side of the roller moving contact fitting with the fixed contact and directly contacts the fixed contact; - an annular moving contact being sleeved outside a radial elastic pin, the radial elastic pin being connected to the rotation shaft, an inner ring of the annular moving contact fitting with the radial elastic pin and directly contacting the end of radial elastic pin, a periphery of the annular moving contact fitting with the fixed contact and directly contacting the fixed contact; - a roller moving contact disposed in a stopping cavity of the rotation shaft, a radial elastic pin being arranged at an inner side of the roller moving contact and the roller moving contact directly contracting the end of the radial elastic pin-, an outer side of the roller moving contact fitting with the fixed contact and directly contacts the fixed contact; - an annular moving contact being sleeved outside a radial elastic pin, the radial elastic pin being connected to the rotation shaft, an inner ring of the annular moving contact fitting with the radial elastic pin and directly contacting the end of radial elastic pin, a periphery of the annular moving contact fitting with the fixed contact and directly contacting the fixed contact; and in that the radial elastic pin comprises a pin disposed in a radial pin socket and a spring sleeved outside the pin.