Flower aromatic components and their relative contents of Oncidium Sharry Baby ‘Sweet Fragrance’ at full flowering stage under conditions of 10 ℃, 20 ℃and 30 ℃were analyzed by solid phase micro-extraction method and GC-MS technology, and aromatic sensory evaluation was also carried out. The results show that there are 24, 33 and 43 kinds of aromatic components in Oncidium Sharry Baby ‘Sweet Fragrance’ flower under conditions of 10 ℃, 20 ℃and 30 ℃, respectively. In which, relative content of ocimene is the highest. With increasing of temperature, component number and relative content in aroma all appear the increasing trend, in which, alkenes is the most and its relative content is the highest, and the second is alkanes. See from the senses, aroma is rich gradually with increasing of temperature, but aroma concentration index basically keeps invariant when temperature over 20 ℃. Comprehensive analysis result indicates that the suitable cultivation temperature of Oncidium Sharry Baby ‘Sweet Fragrance’at flowering stage is 20 ℃.