Seasonal rhythms is the changes with the rule relating to landscape changing in the year: the change of climatic factors, hydrological. geomorphological processes, soil. the migration of animals. the changing appearance of the plants. Seasonal rhythm has great significance for the economic activity of the people. especially in the cultivation sector. Crop cultivation season is the time period with suitable weather conditions for the cultivation of agricultural crops or forestry in each ecological region. Seasonal characteristic influences on crop yield or survival rate of agricultural crops and forest trees. Hence, it is necessary to study weather, climate, soil conditions. vegetation cover and ecology characteristics of the plant. Quang Ninh has suitable conditions for developing diversity crops thanks to the variety of terrain and soil, along with a tropical and humidity monsoon climate. The crops are developed throughout the year. Currently, the province is aggressively implementing programs and projects to promote agricultural production. Therefore, the study of the seasonal characteristic of cultivation sector in Quang Ninh province has an important role in these programs. The contents of this article refers to the rhythm of the seasons and seasonal cultivation in Quang Ninh. and also offer a number of issues about the seasonal rhythms of the natural disaster epidemic in the province.