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1. An electronic device aging test apparatus, comprising a box body (1), a test chamber (2) provided in the box body (1) and provided with at least one set of an air inlet (21) and an air return inlet (22), a test circuit unit provided in the test chamber (2) and configured to connect to an electronic device under test, an electric cabinet adjacent to the test chamber (2) and connected to the test circuit unit to supply power, a circulating air duct (3) provided on a periphery of the test chamber (2) and having two ends in fluid communication with the air inlet (21) and the air return inlet (22) respectively, a circulating fan (4) provided in the circulating air duct (3), and a heating device (6) provided in the circulating air duct (3), wherein the circulating fan (4) drives an airflow to start from the circulating air duct (3), sequentially pass through the air inlet (21), the test chamber (2), and the air return inlet (22), and return to the circulating air duct (3), a fresh air port (31) for external air to enter the circulating air duct (3) and an air outlet (32) for air in the circulating air duct (3) to be discharged outside are opened on a wall of the circulating air duct (3), the air outlet (32) is provided downstream of the air return inlet (22) in an airflow direction, the fresh air port (31) is provided upstream of the circulating fan (4) in the airflow direction, an arrangement position of the fresh air port (31) is between the air outlet (32) and the circulating fan (4), a baffle device (5) is provided between the fresh air port (31) and the air outlet (32), which is configured to open or shield the fresh air port (31) and the air outlet (32) and configured to open or block the circulating air duct (3) located between the air outlet (32) and the fresh air port (31), and the baffle device (5) comprises a rotating shaft (51) rotatably connected to an inner wall of the circulating air duct (3) in an airflow direction perpendicular to an arrangement position of the baffle device (5), a first baffle (52) fixedly connected to one side of the rotating shaft (51) and configured to open or shield the fresh air port (31), a second baffle (53) fixedly connected to the other side of the rotating shaft (51) and configured to open or block the circulating air duct (3), a third baffle (54) fixedly provided on a lateral side of the second baffle (53) that is close to an inner wall of the circulating air duct (3), perpendicular to the second baffle (53), and configured to open or shield the air outlet (32), and a driving assembly (55) connected to the rotating shaft (51) and configured to drive the rotating shaft (51) to rotate; the baffle device (5) has a first working state, a second working state, and at least one third working state between the first working state and the second working state; when the baffle device (5) is in the first working state, the first baffle (52) fully shields the fresh air port (31), the second baffle (53) fully opens the circulating air duct (3), and the third baffle (54) fully shields the air outlet (32); when the baffle device (5) is in the second working state, the first baffle (52) fully opens the fresh air port (31), the second baffle (53) fully blocks the circulating air duct (3), and the third baffle (54) fully opens the air outlet (32); and when the baffle device (5) is in the third working state, the first baffle (52) partially shields the fresh air port (31), the second baffle (53) partially blocks the circulating air duct (3), and the third baffle (54) partially shields the air outlet (32).
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