Micro-pile foundations are widely used in the power industry due to their excellent bearing capacity and the reduced material usage compared to conventional foundations. Mechanized construction of these foundations is often hindered in mountainous areas due to road access issues. To reduce construction difficulty, the amount of foundation material is reduced, which is effective in most cases. However, at times, the uplift resistance of transmission tower foundations may be insufficient, requiring certain improvement strategies to enhance the uplift resistance of micro-pile foundations. To reduce the risk of tower collapse, it is necessary to perform a simulation analysis of the uplift resistance of the improved micro-pile foundations. This study investigates the ultimate uplift bearing capacity by adjusting the radius of some pile bodies or the tilt angle of the piles in micro-pile foundations. The results show that enlarged diameter piles demonstrate superior performance in uplift resistance, while inclined piles can also improve their uplift bearing capacity within a certain angle, thereby reducing the risk of tower collapse. These findings provide a useful reference for the design of transmission tower foundations.