[en] In this study, core technologies has been developed for design and fabrication of the magnetostrictive strip transducers used in the LRUT field. They include the measurement technique for magnetic properties of the magnetostrictive strips and the prediction and evaluation techniques for the transducer performance. In addition, magnetic property effect of a magnetostrictive strip on the transducer performance has been analysed in detail. It is expected that the research results are useful to develop high performance transducers with enhanced inspection range and electrical instruments for operating the transducers