In this study, 5608 records of Kordi sheep body weights collected during 21 years (1990 to2010) in Sheep Breeding Station of Shirvan were used to estimate genetic, phenotypic andenvironmental trends. Best linear unbiased predictions (BLUP) of breeding values were obtained byderivative free restricted maximum likelihood (DFREML) using univariate animal model. Genetic,phenotypic and environmental trends were estimated by regression of average estimated breedingvalues, average phenotypic values and average difference between phenotypic and breeding valueson birth year, respectively. Total genetic progress in 21 years for birth weight (BW), weaningweight (WW), body weight at 6 (6W), 9 (9W) and 12 months of age (12W) were 0.017, 0.890,1.319, 0.727 and 1.199 kg, respectively. Genetic trends for BW, WW, 6W, 9W and 12W were4.4±0.5, 64±2, 73±3, 71.56±4 and 98.4±5 gr per year, respectively. The phenotypic trends for BW,WW, 6W, 9W and 12W were 16±2, 328±13, 227±18, 295±23 and 405±28 gr per year, respectively.Estimates of trends were significant for all traits (P < 0.01).