The present study aimed to investigate the effect of home visit training program on preterm infants’ growth and development within 6 months. In this double blind and clinical trial study, preterm infants were randomly divided into an intervention (N=30) and a control group (n=30). The person who collected the study outcomes remained blind to the outcome measures. Moreover, the researcher who train mothers was blined to the aim of the study.In addition, the statistician who performed the data analysis was kept blinded to the allocation, as well. The inclusion criteria of the study were gestational age under 37 weeks; being fed orally; and living in Shiraz. On the other hand, the exclusion criteria of the study were suffering from brain disorders; congenital cardiovascular diseases; metabolic or endocrine disorders; and known genetic and chromosomal abnormalities. The intervention group received home visit training program for 6 months, while the control group only received the hospital’s routine care. Then, the infants’ growth indexes, including weight, height, and head circumference, and development criteria such as following moving objects with the head, social laughing, keeping the head stable when changing position from lying to sitting, making “Agha” sound, taking objects by the hand, and laughing were compared in the first, second, third, and sixth months.