To explore the characteristics and distribution types of infants aged 6-18 months. A total of 504 infants completed the temperament assessment by the child temperament assessment software. Among 504 infants aged 6-18 months, the most types of temperament for infants were middle type and easy type(48.4% and 43.5%,respectively),then was slow-up-warm type(5.6%)and difficulty type(2.6%) . There is significant difference in partial temperament dimension between infants of different genders and ages. Firstly, there were significant differences ...