Coal mine ventilation pipeline connecting assembly

The utility model discloses a coal mine ventilation pipeline connecting assembly which comprises a ventilation pipe, a clamping pipe and a mounting support, the outer side end of the clamping pipe is fixedly sleeved with a first flange plate, the outer side end of the ventilation pipe is fixedly sleeved with a second flange plate, and annular inner grooves are formed in the two sides of the clamping pipe; annular outer sleeves clamped in the annular inner grooves are fixedly connected to the two sides of the ventilation pipe correspondingly, an annular protruding block is fixedly connected to the outer side face of the first flange plate, an annular concave groove is fixedly formed in the outer side face of the second flange plate, and two sets of threaded pins are fixedly connected to the outer side face of the protruding block. The inner wall of the sunken groove is provided with an insertion hole penetrating through the second flange plate. According to the utility model, the two groups of ventilation pipe