The present study was conducted at district Kom Ombo sugar cane farms, (latitude of 24o 28o N and longitude of 32o 57o E), Aswan Governorate, in the two seasons of 2015/2016 and 2016/2017 including plant cane and 1st ratoon crops, respectively. To study the effect of harvesting age and phosphorus fertilization levels on yield and quality of some sugar cane varieties. Field experiment included twenty-seven treatments represented the combinations among three harvesting ages (10, 11 and 12 months) three phosphorus fertilization levels [30, 45 and 60 kg P2O5/fad.] and three sugar cane varieties [G.T. 54-9, G.2003-47 and G.2004-27]. Randomized complete block design with three replications laind aut in split-split plots arrangement.