The main objective of the study was to evaluate the effects of applying with nitrogen fertilizer as basal dressing or drip fertigation on the growth of banana root system.These parameters of banana root system,such as root number and diameter of the first lateral roots,total root length and surface area of the feeding roots,and so on,were calculated and measured.The results obtained were as follows: It was could increase the growth of banana roots on condition that using nitrogen fertilizers reasonable by basal dressing or drip fertigation,for example,there had an increase of 52% on the surface area of the banana feeding roots under drip fertigation comparing with the treatment of CK; Furthermore,compared with basal dressing nitrogen fertilizer,drip fertigation could significantly increase the surface area of the banana feeding roots,there had an increase of 15%.