In order to solve the real-time positioning problem of flexible wearable ultrasonic transducer array unit under dynamic conditions, a new transducer array based on button flexible structure is designed. The design of push-button flexible hinge provides three-dimensional adaptive flexible deformation, and the dual ultrasonic array structure combining rigidity and flexibility provides real-time ultrasonic positioning means for flexible transducer array elements, thus realizing two-dimensional area array ultrasonic phased imaging in dynamic wearable scene. This design provides a new idea for the development of flexible wearable ultrasonic equipment.