The invention discloses a power supply reliability analysis-based power distribution automatic terminal point distribution method. According to the method, a power supply reliability simplified calculation model is established; the model is suitable for power supply reliability calculation of specific target net racks of different power distribution automatic terminal point distribution schemes; through power supply reliability calculation and verification, an optimized power distribution automatic point distribution scheme satisfying a power supply reliability target value is obtained through iterative optimization; and therefore, by virtue of the power distribution automatic planning design, power supply reliability and economic efficiency can be balanced more reasonably on the basis of satisfying the power supply reliability requirement, and the economic benefit and social benefit of the power distribution automatic construction investment are improved.