Abstract：First，all the defects of existing pile foundations are set forth. Then the technological process and principle of Professor Xie Qindao¢s patent technology，i. e. pile foundation engineering innovation technology —cast-in-situ thin wall pot pile technology is specially introduced. The economical and efficient characteristics，high load-bearing capacity and good environment benefit of this technology are specially discussed by comparing with other kinds of pile foundations. The technology and economy indexes are compared and analyzed by taking Wenzhou Yince Hotel as an example. At last，the good application prospects and significance are pointed out in such fields as communication project，water conservancy project，marine engineering，and so on.
