The utility model provides a joint evaporative air cooler, includes the air cooling framework, its upper portion sets up the draught fan, be provided with evaporation air cooling core on the air cooling framework of draught fan below and empty the jointly evaporation that cooled tube bundle made up futilely dry air cooling heat transfer subassembly, the subassembly that should conduct heat is a font. This font structure specifically is: futilely empty cooled tube bundle horizontal set up in form the air outlet on the air cooling framework of draught fan lower part, evaporation air cooling core vertical type layout is in the air cooling framework both sides of empty cooled tube bundle below futilely and form the air intake. The utility model discloses utilize two sideways vertical evaporation air cooling as the air intake, compact structure, area are little, make full use of finned tube and buckled plate heat transfer element characteristics. Use vertical all -welded ripple core as evaporating the air cooling, heat transfer efficiency is high, the pressure drop is low, area is little, using horizontal finned tube bundle as dry air cooling, effectively utilizing air side fin extension area, heat transfer efficiency is high.