The invention discloses a guided wave tomography double-array adjustable directivity spiral Lamb wave transducer which comprises an annular emitting transducer array and an annular receiving transducer array, wherein the annular emitting transducer array and the annular receiving transducer array are arranged along a circumference direction of a pipeline and are used for transmitting and receivingspiral Lamb waves respectively; each transducer unit comprises a permanent magnet; a round hole is formed at a diagonal of a curved coil, and then the curved coil is connected with other coils of a same array through a non-magnetoconductivity annular line; a buckle is arranged on the annular line; the curved coil is fixed in a position on the annular line through the buckle; the curved coil can be rotated along with movement of the annular line; and the annular line is wound on the outer wall of a pipeline along the circumference direction, is at a straightened state and can be moved along the circumference direction and an axial direction around the pipeline. By adopting the transducer, the annular emitting transducer array and the annular receiving transducer array can be moved along the annular line, so that the transducer is flexibly moved along the pipeline in detection, defects of the pipeline can be accurately detected, and the flexibility and the reliability of the transducercan be effectively improved.