A stator assembly for a wind turbine, comprising: a stator bracket, and a stator core, wherein the stator bracket comprises a support enclosure plate, the stator core is mounted on the support enclosure plate, a first axial airflow channel is formed between the support enclosure plate and a radial side surface of the stator core opposite to an air gap between the stator core and a rotor, wherein the stator assembly further comprises an airflow delivering unit for supplying a first cold airflow to the first axial airflow channel, which makes the first cold airflow flow in an axial direction of the first axial airflow channel, wherein the stator bracket is provided in a radially inner side of the stator core, and the stator bracket is further provided with a second axial airflow channel formed in a radially inner side of the support enclosure plate, and the stator core further comprises the airflow delivering unit, which is configured to supply the first cold airflow to the first axial airflow channel and supply a second cold airflow to the second axial airflow channel, and the airflow delivering unit is configured to make the first cold airflow and the second cold airflow be in the same direction, wherein the airflow delivering unit comprises a cold airflow confluence box provided at one axial end of the stator core and a hot airflow confluence box provided at the other axial end of the stator core, the first cold airflow is supplied to the first axial airflow channel and the second cold airflow is supplied to the second axial airflow channel through the cold airflow confluence box, and the hot air flow confluence box is configured to collect the first cold airflow through the first axial airflow channel and/or the second cold airflow through the second axial airflow channel. a stator bracket, and a stator core, wherein the stator bracket comprises a support enclosure plate, the stator core is mounted on the support enclosure plate, a first axial airflow channel is formed between the support enclosure plate and a radial side surface of the stator core opposite to an air gap between the stator core and a rotor, wherein the stator assembly further comprises an airflow delivering unit for supplying a first cold airflow to the first axial airflow channel, which makes the first cold airflow flow in an axial direction of the first axial airflow channel, wherein the stator bracket is provided in a radially inner side of the stator core, and the stator bracket is further provided with a second axial airflow channel formed in a radially inner side of the support enclosure plate, and the stator core further comprises the airflow delivering unit, which is configured to supply the first cold airflow to the first axial airflow channel and supply a second cold airflow to the second axial airflow channel, and the airflow delivering unit is configured to make the first cold airflow and the second cold airflow be in the same direction, wherein the airflow delivering unit comprises a cold airflow confluence box provided at one axial end of the stator core and a hot airflow confluence box provided at the other axial end of the stator core, the first cold airflow is supplied to the first axial airflow channel and the second cold airflow is supplied to the second axial airflow channel through the cold airflow confluence box, and the hot air flow confluence box is configured to collect the first cold airflow through the first axial airflow channel and/or the second cold airflow through the second axial airflow channel.