The invention relates to a ventilated security door. The ventilated security door comprises a door frame and a door leaf, wherein the door frame and the door leaf are in hinge connection through a hinge; the door leaf comprises two layers of door panels, namely an inner panel and an outer panel, the inner panel and the outer panel are connected through a connection frame, ventilation holes are formed in the outer panel in an array, ventilation grids are arranged on the inner panel, and a shielding device is arranged between the inner panel and the outer panel; the shielding device comprises a shielding grid plate and a sliding device, the sliding device comprises sliding rods and sliding sleeves, the sliding rods are sleeved with the sliding sleeves, the sliding sleeves are fixed on the outer panel, the sliding rods are connected with the shielding grid plate through connection plates, and grid holes are formed in the shielding grid plate; ventilation grids with downwards openings are arranged on the inner panel of the door leaf, the ventilation holes are formed in the outer panel, opening and closing of the ventilation holes are controlled through the shielding grid plate, a ventilation function is realized, additionally, the condition that the privacy is peeped from the outside of a house during ventilation can be prevented, and the ventilated security door is convenient to operate, practical and safe.