Bangladesh certainly affected by natural disaster and coastal district of Bangladesh frequently exaggerated by this event. Natural disaster undoubtedly impact upon the individual’s livelihood in coastal areas and extent of result sustain for a prolonged term. Beyond some factors have been identified which badly accountable for produces impact on coastal areas, where solely food security affect severely. Predominantly it has been identified food security becomes more vulnerable after the natural disaster and people of coast zone suffered much in this condition. In this study survey method was implemented and data were collected through interview schedule by using simple random sampling. Data were collected from household heads from Kamarkhola and Sutakhali villages of Dacope Upazila of Khulna district. Descriptive statistics was used to estimate percent analysis and inferential statistics was employed for Chi-square tests as quantitative data analysis; whereas, the secondary source was applied in the qualitative analysis. This research intent to evaluate the extent of change in food availability, food accessibility and consumption in the household level. This study correspondingly tries to identify the responsible causes of change of food availability, food accessibility and consumption in the household level. The further study analyzed the month wise food adequacy in household level in a post-disaster situation. Finally, in propositions testing, there were founded the significant relationship between the independent and dependent variables.