Abstract: The strength composite pile is a new type of composite pile that a core pile is inserted into a deep cement mixing pile before the initial set. Based on the previous studies and a project case, load tests are conducted on a great number of test piles including pipe piles and composite piles, and the axial force of composite piles is measured. It will provide a beneficial reference for other similar projects. The slow maintenance loading method is adopted. The test results show that the bearing capacity of the strength composite pile increases obviously compared with that of the pipe pile, and it meets the requirements of engineering construction. Besides, the cost of the composite pile decreases significantly.