An embodiment of the invention discloses a switching station equipment reliability calculation method and a switching station equipment reliability calculation device. The switching station equipmentreliability calculation method provided by the invention fully considers the influences of weather and seasons on switching station equipment, calculates reliability indexes for different seasons andweather, fully considers the distribution conditions of weather, fitting weather distribution by normal distribution, represents a second average failure rate and a second average failure time in theform of correlates, calculates the reliability indexes based on the second average failure rate and the second average failure time so that the reliability indexes fully consider the influences of weather changes, and solves the technical problem that an existing switching station equipment reliability calculation method does not consider the influences of weather changes and large error exists between a calculation result and the actual situation.