Human beings are facing great challenges today on global warming, resources shortage, land degradation and population expansion. The development of CT (conservation tillage) should have big help to reply the challenges and promote sustainable agriculture forward. CT has become the major tillage method in American and Australian continents, also has development in European, Asian and African continents with different levels. The agronomy study of CT in China had started in early 60 last century, but the mechanized CT was started later. From 1991, quite a few of light as well power driven notill planters, together with many CT field technologies have been created, thus，a sound base for CT demonstration and extension was formed.  