The utility model provides a level pressure temperature measurement standard apparatus, it includes: the refrigerator, it includes at least one cold head, the pressure chamber, the refrigerator is right the pressure chamber refrigerates, the pipeline part is pressed in the accuse, and its is right the pressure is controlled to working gas in the standard apparatus be provided with accurate ball -type microwave resonant cavity in the pressure chamber, accurate ball -type microwave resonant cavity presses the pipeline part to be connected with the accuse. The utility model discloses a relative pressure control precision is high, has overcome the inferior position that traditional methods of measurement temperature measurement degree of accuracy is limited by the absolute pressure measurement degree of accuracy, is accurate ball -type microwave resonant cavity resonance frequency measurement accuracy higher by 3 than absolute pressure measurement accuracy 4 the individual order of magnitude is favorable to the foundation of high accuracy temperature measurement standard apparatus.