This report delineates the design parameters for a mechanical screw jack engineered to hoist a 300kg load. Emphasizing structural robustness, operational efficiency, and user safety as primary objectives, the design framework integrates various considerations. A sturdy framework, constructed from high- strength materials, forms the backbone of the design, engineered to endure the imposed load. Critical components, notably the threaded screw and supporting structure, undergo meticulous analysis to ascertain their load-bearing capacity, with safety margins incorporated to avert structural failure. To enhance operational efficiency, the design meticulously selects materials and geometries to minimize frictional losses and optimize mechanical advantage. Furthermore, the screw jack integrates a mechanical locking mechanism to secure the lifted load, preventing inadvertent descent. Safety features are integral, encompassing overload protection mechanisms to forestall exceeding the rated capacity and a user-friendly control system to facilitate straightforward operation. Moreover, ergonomic considerations are factored in to ensure user comfort and operational ease. In summary, this abstract encapsulates the core principles of a mechanical screw jack engineered to handle a 300kg load, prioritizing structural integrity, operational efficiency, and user safety in its design ethos.+