In order to solve the outstanding problems of energy trap in the central region,large transducer area and low spatial resolution in the scanning imaging flaw detection of traditional unway coils and butterfly coil EMAT,an electromagnetic ultrasonic transverse wave direct incidence transducer(SWTS-EMAT)using a small size coil of straight wire is proposed.The finite element model of the SWTS-EMAT transducer in the time domain and frequency domain was established,the influence of coil width and excitation current frequency on its acoustic field characteristics was studied,the SWTS-EMAT radiated acoustic field measurement system was built,and the acoustic field measurement experiment of the new transducer was measured.The effectiveness of the simulation model is verified.The results show that the symmetrical distribution of SWTS-EMAT radiated acoustic field with respect to the center of the coil increases to 5.5 times and the width of the acoustic field decreases by 60%.With the increase of the excitation frequency,the amplitude of the sound field decreases by 32%,and the half-diffusion angle of the sound field decreases by 42%.