Scientific drilling is ascientific project which aims to obtain various geological data of deep crust, such as tectonic movement, climate change, volcanic eruption, earthquake mechanism, and meteorite impact, and to establish a longterm deep observation system. Implementing the scientific drilling project will not only promote the China’s geoscientific theory and research to step onto international stage, making China a geological power from preliminary geological study, but also push China’s overall progress in drilling engineering, improving China’s technological and academic level, as well as China’s international influence. Among all the deep information obtained through scientific drilling, cores can directly reflect history and material composition of the earth's evolution and are also the most important research material for geologists. Since 2001 when the CCSD project started, it has gained the reputation worldwide for its continuously, highquality, and intact coring. This paper briefly introduces four continental scientific drilling projects having successfully implemented in China, with an emphasis on the drilling technical systems which were completely designed for coring by Chinese experts. The four systems are the downhole motor coredrilling technology, an enhanced technology via large diameter and lengthening drilling tools in a single round trip, the original coring drilling system of extremely complex stratum, and undamaged methods to push all cores out of the drilling tools. At the same time, this paper also describes the main achievements of these drilling systems obtained in engineering application.