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The utility model belongs to the technical field of water meter detection, and particularly relates to a full-automatic water meter calibrating device with pressure resistance detection, which is used for performing pressure resistance detection on a water meter and comprises a water tank, a water supply component and an extraction component are arranged on the water tank, and a clamping component is arranged between the water supply component and the extraction component. The clamping assembly is used for clamping a water meter, the water supply assembly is used for conducting water supply pressure resistance detection on the water meter, and the extraction assembly is used for extracting residual liquid water in the water meter. After detection, residual liquid water cannot be generated outside and inside the water meter, and meanwhile, dust and impurities inside the water meter can be removed.