Abstract: The central problem of eddy current phased control array technique, also called the three-dimensional eddy current technique, is to stimulate a circular rotary magnetic field in the space by a probe array. Any magnetic field in space am be completely described by a three-dimensional vector equation. However.because of the complexity of the boundary conditions of the probe array magnetic field, if the effect of the eddy current field is also considered, it will become very complicated to solve exactly the se-cond order partial differentiation of the Maxwell equation group. In consideration ol' applications in engineering practice, this article, under certain hypothetical conditions, endeavors in a preliminary analysis of eddy current phase control array magnetic field. to prove the existence of the rotary magnetic field. It also explores the multiple factors affecting the rotary field. Through experiments, it has been shown that the conclusions drawn are correct.