The invention relates to a packaging bag one-way thin film valve point heating device. The packaging bag one-way thin film valve point heating device is characterized by comprising a rack, a discharging frame, a first guide roller, a second guide roller, an adjusting roller, an adjusting cylinder, an adjusting swinging arm, a discharging roller, a pressing roller, a motor, a pressing roller cylinder, a lower cutter, an upper cutter, a cutter slide plate, guide rails, a slide plate cylinder, a point heating cylinder, an upper point heating block, a lower point heating block, a first clamping cylinder, a second clamping cylinder, a connection plate, a compressing block, a compressing bottom plate, a supporting plate and an adjusting screw. The packaging bag one-way thin film valve point heating device has the advantages that continuous point heating production can be performed on a one-way thin-film valve in a packaging bag, and the production efficiency of the packaging bag is improved.