On the basis of the experiment, the quality of pile body concrete is detected by ultrasonic curve, used the criteria as aided analysis, and the aviation of the result that the piles of wave unparallel is analyzed, and the result is rectified by the method of amend. The result shows that the criteria of wave range is seriously, and the pile of wave unparallel will affect the result, application of the multi-parameter synthetic analysis method in the pile ultrasonic in practice.