The utility model discloses a conversion equipment is connected to a colliery underground ventilation section of thick bamboo, including return bend, snap -ring groove, clamp, dryer, connecting rod, fixed plate, the return bend both ends are equipped with the snap -ring groove respectively, the dryer diameter is greater than the return bend diameter, and the dryer overlaps in return bend one end, the clamp with dryer soft cloth partial fixing on the snap -ring groove, connect dryer and return bend, the fixed plate passes through the connecting rod to be connected with the return bend, and fixed plate and mine wall fixed connection are compared with prior art, the beneficial effects of the utility model are that this novel conversion equipment is connected to a colliery underground ventilation section of thick bamboo, the connection speed is fast, and the leakproofness is good, and traditional dryer bending angle undersize has been solved in the installation and dismantle be convenient for, and it is not smooth to cause the dryer to ventilate easily, problem that the dryer was lost.