Aiming at the problems that common optical glide slope stabilization algorithms cannot keep pilot control burden and landing error in good condition simultaneously, and cannot realize close-loop control, an improved optical glide slope stabilization algorithm is proposed. Firstly, simplified model of carrier motion was introduced, and point stabilization, angle stabilization, line stabilization and inertia stabilization which are common optical glide slope stabilization algorithms were analyzed. Then the mathematic models of pilot control burden and landing error were established. Lastly, based on inertia stabilization, the stabilization algorithm was solved by using landing error as pilot control burden, and the lamp-box motion control rules of improved algorithm were obtained. The analysis results indicate that the two main factors of pilot control burden and landing error were overall considered, and the lose-loop control was realized by landing error in this improved algorithm, which can provide a new idea for optical glide slope stabilization.