Ventilation device for building design

The utility model discloses a ventilation device for architectural design, which is characterized in that a fixed side table is arranged on the side surface of an architectural design ventilation pipe, a guide sliding rod is arranged on the fixed side table, a pushing spring is sleeved on the guide sliding rod, corrugated pipes are arranged at two ends of the architectural design ventilation pipe, and an end flange is arranged at one end of an auxiliary telescopic end pipe; a ventilation fan is arranged in the architectural design ventilation pipe, the auxiliary telescopic end pipes are arranged at the two ends of the architectural design ventilation pipe correspondingly, and the end tables with the holes on the auxiliary telescopic end pipes slide on the guide sliding rods on the fixed side tables in a reciprocating mode. The two ends of the pushing spring abut against the fixed side table and the end table with the hole correspondingly, the building design ventilation pipe and the auxiliary telescopic end p