The medium-term urbanization stage means the urbanization rate between 30% to 70%.Comparing with the world’s major developed countries and China during this stage, the annual carbon emissions and carbon emissions per capita will keep rising trend, but national growth rate has huge difference. The peak of carbon emissions will not appear in stage of medium-term urbanization, but in its maturity period. The results based on Granger Causality Test show that co-relation Granger causality between urbanization rate and carbon emission may not exist in all countries, but which between carbon emissions per capita and urbanization rate exists.