<p>The present article deals with time-dependent deflection analysis of natural fibre-based hybrid composite flat panel subjected to blast pulse. This study showed how the sustainable fibre-based hybrid composite responds to blast pulse compared to synthetic fibre-reinforced laminated composite and purely natural fibre-reinforced composite. For this, a finite element-based HSDT numerical model is developed. The governing equation of time-dependent deflection is derived using variational approach, and the solution of the equation is obtained through the Newmark direct iteration method. The devised mathematical model has been transformed into computer code in MATLAB platform for predicting the dynamic deflection response. Parallelly, different variants of multi-layered hybrid composites have been prepared by changing the sequence of glass and banana fibre mats. The mechanical and physical properties of each variant of hybrid composite are evaluated experimentally and further utilized as input in numerical model to solve different numerical examples. The proposed model is first checked for its stability and accuracy by comparing it with published results and then utilized for investigating the influence of various parameters (geometrical and material) on the transient deflection response of multi-layered hybrid composites under two types of blast load conditions. Such type of investigations will help to understand the blast behaviour and promote the use of sustainable fibres along with synthetic fibres to high-level structural applications and blast-resistant applications.</p>