Hydraulic folding machine saving your labor cost and increasing production efficiency for duct folding process in HVAC duct fabrication. With special design on folding blade which is convenient for locating the galvanized sheet with TDF, drive cleat joint flange or other type of connection joint and then fold them without any touch or damage. Electrical sensor can be adjusted for detecting folding degrees to make sure the correct right angle folding on duct body. Touch screen for easy operation. The frame adopts full steel welding structure with enough hardness and rigidity. It also has been heated processed and highly frequently vibrated. Adopting floor boring-milling machine for guaranteeing the precision.