The invention relates to an airflow twisting device used for weaving and with a filter screen being convenient to replace. The airflow twisting device is used for twisting rough yarns, and comprises a vortex airflow twisting unit (5), the vortex airflow twisting unit (5) comprises an annular body portion (53) and an annular housing portion (54), the interior of the annular body portion (53) is provided with a cylindrical vortex air chamber (50), the annular housing portion (54) is integrally molded and accommodates the annular body portion (53), the annular body portion (53) is provided with a plurality of tangential airways (51) which are uniformly distributed along the circumferential direction in order to input airflow along the tangential direction of the cylindrical vortex air chamber (50), and an annular airflow distribution chamber (540) is arranged between the annular housing portion (54) and the annular body portion (53).