Pinhole type ventilating brick capable of adjusting air permeability

The invention discloses a pinhole type ventilating brick capable of adjusting an air permeability. The pinhole type ventilating brick comprises a base brick and at least one ventilating brick core arranged in the base brick, a steel sleeve is attached to the outer circumference of the ventilating brick core, the lower end surface of the steel sleeve extends out of the lower end surface of the ventilating brick core for a certain length, a sealing cover plate is fixedly arranged at the bottom of the steel sleeve, an gas chamber is formed between the lower surface of the ventilating brick core and the upper surface of the sealing cover plate, a gas supply pipeline communicated with the interior of the gas chamber is arranged below the gas chamber, a plurality of pinhole-shaped ventilating channels penetrating through the upper end face and the lower end face of the ventilating brick core are arranged in the ventilating brick core, and a tail adjusting device capable of controlling the on-off states of the pinho