The evolution of human walking gestures is the evolution to adapt to new environments. Evolutionary adaptations in humans, including longer, straighter legs and increased average BMI, were examined using a spring-mass walking model to analyze their impact on locomotion efficiency. Spring-mass model considers walking problems in mechenics dimension. The simulation seperates variations that affects human walking to four independent parameters: mass, touch-down degree, leg length and leg stiffness. Simulation results demonstrated that model has lighter mass, which walks in smaller touch-down degrees gaits by lengthened, robust legs improved walking efficiency. By comparing CM displacement, research also addressed discrepancies between flat and normal gaits. Flat walking compensates its forward moving efficiency and distance per step to gain smaller vertical CM amplitude, accompanied by larger vertical CM amplitude and slower walking speed. Stronger legs and a curved, large-step gait reduced knee and waist pressure in individuals with higher BMI. The study highlights the adaptive significance of human physiological evolution in relation to locomotion efficiency. The study will provide insights into bipedal explanation for evolution tendency and existing problems.