No-tillage is one of the most important agricultural management systems. One way to determine if an ecological system can be sustainable is to evaluate the long-term effects it has on soil properties and on crop yields. The study was conducted from a 25 years'continuous no-tillage (NT) and conventional tillage (CT) corn (Zea mays, L.) production experiment on a Maury silt loam (Typic Paleudalfs) soil. The results showed that there was no significant difference in soil bulk density between CT and NT. Soil pH decreased and soil organic C and N increased with increasing application of NH₄NO₃ fertilizer. Soil organic C, organic N, exchangeable Ca, Mg,K and Mehlich Ⅲ P in 0-5 cm soil layer were all significantly higher with NT than with CT. During 25 years, the yield of NT corn had no significant difference from that of CT corn. For the last 11 years (1984-1994), the yield of NI corn was significantly higher than that of CT corn. This means that the continuous corn production with long-term mulched no-tillage treatment is a sustainable production system on this Typic Paleualfs.