In order to clarify the mechanical properties of skeleton dense asphalt treated base mixture （SDATBM）， dynamic modulus was used as a mechanical index and uniaxial dynamic compression modulus tests were carried out on three kinds of SDATBM （SDATBM-25， SDATBM-30 and SDATBM-40） with nominal maximum particle sizes of 25， 30， 40 mm under different test conditions， and the dynamic modulus master curves of the above three kinds of SDATBM were plotted. On this basis， influence of the nominal maximum particle size， loading frequency and temperature on the dynamic modulus was investigated. The results show that SDATBM has excellent mechanical properties； the dynamic modulus of SDATBM with different nominal maximum particle size has the same change trend at different frequency and temperature， and the modulus of three kinds of SDATBM decreases with the increase of temperature or the decrease of frequency； in the high temperature and low temperature region， temperature and frequency variations have little effect on the dynamic modulus， but in the temperature range of 20-35 ℃ and moderate frequency range， temperature and frequency variations have the greatest influence on the dynamic modulus； in a wide temperature range and a large loading frequency range， the dynamic modulus of SDATBM increases with the increase of nominal maximum particle size.