The invention discloses a method for measuring a latitude by utilizing a pendulum gyroscope, which particularly comprises the following steps of: 1, arranging the pendulum gyroscope at a certain station point; 2, measuring a swing period of the pendulum gyroscope; and 3, calculating the geographic latitude of the station point by using an external computer according to the obtained swing period of the gyroscope. The method of the invention has the advantages of simpleness, no need of large-scale ground-to-air connection survey, capability of independently measuring the latitude, higher late-time data processing speed and capability of monitoring variation of the latitude in real time.