The invention discloses a vacuum gauge which comprises the components of a resistance gauge, a cold cathode ionization gauge, a permanent magnetic assembly placed outside the vacuum gauge, and a high-voltage socket which is used for connecting vacuum measuring equipment with the vacuum gauge. The vacuum gauge further comprises a flange assembly and an anode assembly. The flange assembly comprises a blade flange and a tube which is welded on the blade flange. The tube is provided with a chamber for mounting the resistance gauge and an anode assembly. The anode assembly comprises a pressure plate, a metalized ceramic assembly and an anode pole which is welded on the ceramic assembly. The pressure plate is provided with a welding trough for welding the ceramic assembly and a chamber for mounting the resistance gauge and the ceramic assembly. The measuring range of the vacuum gauge can reach 10<5>Pa-10<-7>Pa, thereby expanding the upper measurement limit of the cold cathode ionization gauge.