To verify the applicability of the pull-out method in strength testing of ultra-high strength concrete, the cast-in-place pull-out method and post-install pull-out method were used to test the strength of ultra-high strength concrete. The strength of test pieces was graded at threelevels, C120, C150, and C180, and six groups of test pieces and a certain number of test cubes were selected for each strength level. Through experimental data fitting with the least square method and calculation of various parameters of the regression equation, some conclusions are drawn: all kinds of parameters are within reasonable ranges, and the pull-out method is suitable for testing the strength of ultra-high strength concrete. Comparison of data from different pull-out methods shows that, for the same kind of material, the cast-in-place pull-out method has higher accuracy, the strength curve of ultra-high strength concrete has a similar trend to that of steel fiber cement mortar, and the strength detection range of the post-install pull-out test is wider than that of the cast-in-place pull-out test.