The invention discloses a device and a method for testing the pulse blowing jet included angle and the jet offset angle. The test device comprises a pulse valve, a gas bag, a blow
pipe provided with a plurality of nozzles, a gas source processor, an
air compressor and a pulse controller, wherein a filling port is arranged on the blow
pipe; and an image net board is arranged below the blow
pipe. The test method comprises: firstly, filling a colorful developing solution into the filling port, releasing air through pulse of the pulse valve, and spraying the colorful developing solution onto the image net board through the nozzles to form a jet image; secondly, measuring the
diameter D and the offset t of the image; and thirdly, calculating the jet included angle and the jet offset angle according to the
diameter d of the nozzles and the distance h between the nozzles and the image net board, namely through a formula 2arctan((D-d) / 2h) and arctan(t / h). The invention can accurately calculate the jet included angle and the jet offset angle and apply the obtained data to
engineering design, makes blown air flow capable of covering the length of the whole filter bag, strengthens the ash removal effect, and prolongs the service life of the filter bag.