The invention relates to a phase-control high-intensity focusing ultrasonic transducer and a magnetic resonance breast coil integrating device. Based on the mechanical structure of a traditional magnetic resonance MRI breast coil, the invention provides a scheme of fixing a PHIFU transducer and the attached devices thereof on the side of the breast coil, so as to realize fixing the PHIFU transducer in the limited interior space of the breast coil and realize the emission and spread of the supersonic wave. The invention avoids the electromagnetic interference in MRI imaging by using the nonmagnetic piezoceramic materials and a nonmagnetic shielding line to pack a driving signal of the transducer. The invention realizes the organic integration between the MRI coil and PHIFU transducer, solves the problem of the electromagnetic compatibility in the integrating process, and provides an effect solution to real-time position and guide the precise image in the PHIFU working process and lossless temperature measurement.