Spray　cooling　with　liquid　nitrogen　as　the　working　fluid　has　been　widely　employed　in　a　plenty　of　fields　requiring　cooling　at　cryogenic　temperature,　such　as　the　cryogenic　wind　tunnels　and　cooling　superconducting　magnets.　In　this　study,　we　built　a　liquid　nitrogen　spray　system　and　experimentally　investigated　the　influence　of　injection　pressure　difference　on　the　droplet　size　distribution　and　the　spray　cone　angle.　The　measurements　using　particle　size　analyser　show　increasing　the　injection　pressure　difference　improves　the　atomization,　as　indicated　by　the　homogenization　and　reduction　of　the　droplet　size.　The　initial　spray　cone　angle　is　insensitive　to　the　injection　pressure　difference.　However,　the　far-field　spray　cone　angle　decreases　dramatically　with　increasing　the　injection　pressure　difference.　The　results　could　enrich　our　knowledge　of　spray　cooling　of　cryogenic　fluids　and　benefit　the　design　of　cryogenic　spray　cooling　systems.　(C)　2017　Elsevier　Ltd.　All　rights　reserved.