Background: Improper feeding practices results in under nutrition which is one of the leading causes of child mortality. Inadequate knowledge, attitude of mothers influences poor feeding practice. Nutrition Education Intervention can improve health and nutritional status of the children.

Objective: The objective of the study was to examine the effect of nutrition education intervention on complementary feeding practices of mothers in Bangladesh.

Methods: A quasi experiment study conducted at Khude Bormi village, Gazipur from July 2021 to 2022. Forty participants were recruited conveniently. Nutrition education intervention was given for two weeks. Data were collected using structured self-administered questionnaires including Socio-demographic Questionnaire, Knowledge Attitude and Practice Questionnaire before and after intervention. Data were analyzed using Descriptive statistics and Inferential statistics.

Results: The average age of the mothers was about 25 years & most of the mothers were housewives. The mean difference of knowledge was (mean -5.075, SD= 2.28), attitude (Mean -21.875, SD= 7.19), and practice (Mean= -15.050, SD= 6.39) regarding complementary feeding among mothers that indicates statistically significant differences before and after intervention.

Conclusion: This study found that nutrition education intervention significantly improved mother’s knowledge, attitude and practices regarding complementary feeding. Nutrition education intervention program should be conducted to improve the complementary feeding practice of mothers at remote community level.