Abstract: In order to determine the practical effects of increasing the speed of air current inside greenhouse on the production of healthy seedlings of muskmelon and the optimal air current speed, some characters of container-growing seedlings of muskmelon ‘‘Elizabeth’’ were investigated after being treated by the forced air current at the speed of 0.1m/s (V1), 0.5m/s (V2) and 0.9m/s (V3), while V0(0m/s)was taken as control. Results showed that after treatment, compared with control, it was observed that stem diameter, leaf thickness, total dry mass, and chlorophyll b content in cotyledon increased, and seedling height decreased significantly. The latter four values varied more remarkably with the air current speed increasing. A significant increase in healthy index were found after being treated by V2 and V3, compared with control. V3 increased the root/shoot ratio, while reducing the net photosynthetic rate and chlorophyll content in leaf. However, V2 increased the net photosynthetic rate and chlorophyll content in leaf as well as the leaf number and root diameter. Therefore, it is possible that production of healthy muskmelon seedlings by increasing the speed of air current. The air current speed at 0.5m/s is suggested to being used for practical production..