Abstract: This article introduces the adaptive curve surface profiling technology using iterative methods. First, by exciting all the elements of the phased array probe, a plane wave is generated and the received echo is measured. Then, the transit time from the echo signal is extracted and the delay law is iteratively calculated according to the transit time, and the delay law is applied to probe to generate the next plane wave. Finally, the pulse-echo surface analysis method is used to construct the surface shape of the test piece. With the help of the remote control interface of Acquire software, the client software was developed to realize the function integration of adaptive profiling. The experimental results show that this method can accurately measure the surface shape of curved components with less amount of calculation.