Comparison test device of pavement water seepage instrument and comparison test method thereof

The present invention discloses a comparison test device of pavement water seepage instrument. The comparison test device comprises a water tank body, a supporting disc and an adjusting disc, the supporting disc and the adjusting disc are arranged on the upper portion of the water tank body, the contact faces of the supporting disc and the adjusting disc are tightly attached, the upper surface of the supporting disc is used for being connected with the bottom of the pavement water seepage instrument in a sealed mode, and water leakage holes are formed in the supporting disc. The adjusting disc is provided with water seepage holes capable of being aligned with and staggered with the water leakage holes, and a sealing mechanism is arranged on the contact face of the supporting disc and the adjusting disc. The supporting disc and the adjusting disc are made of non-water-seepage materials. A plurality of water seepage holes with different specifications are formed in the adjusting disc. The invention further disc