The L- series cheap 50 by 100 exhibition canopy tent has the width ranging from 30m/ 40m/ 50m, eave height is 4m and the bay infinitely extended in multiples 5 meters. The size of aluminum frame adopted 120mm * 300mm * 5mm, using hot dip galvanized steel part surface treatment with thickness over 60um. Tarpaulin adopted double PVC synthetic fiber, specifications of tarpaulin for the roof is 850 grams per square meter, and for sidewalls is 650 grams per square meter, the wind load is up to 100km/ h.