The representative earth-rock embankment construction section in the reconstruction and expansion project of the National Highway Dana Highway from the provincial boundary (Hunchun) to Dongning was selected to study the deformation and compaction characteristics of the earth-rock embankment under different loose paving thicknesses and different rolling cycles. In particular, the differential settlement control index was used to determine compaction construction technique of earth-rock embankment with main packing filler of highly-weathered and medium-weathered tuff. Portable falling weight deflectometer (PFWD) was used to detect dynamic elastic modulus (E_vd) of earth-rock embankment. The E_vd value and differential settlement of earth-rock embankment after each rolling are linearly fitted. All correlation coefficients are above 0.86, which indicates that the E_vd value has a good linear correlation with the differential settlement. The finite element theory was used to establish a three-dimensional numerical model of the earth-rock embankment to analyze the dynamic response of the embankment under the action of vibration load. The compaction effect and influence depth of the vibratory roller on the roadbed was analyzed. It is found that the attenuation rate of the vertical dynamic stress along the depth direction tends to be initially fast and turns slow thereafter. The vibratory compaction process of a 32-ton roller can repeatedly strengthen and compact the lower compaction layer. Variance analysis indicates that the influence of roller vibration frequency on vibration compaction of earth-rock mixed embankment is greater than the amplitude excitation force.