The invention relates to a determination method of a lock losing state of satellite tracking of a GPS receiver. The method is characterized in that: a frequency error of carrier loop tracking is selected as a determination condition that is used for determining whether a tracking loop is in a lock losing state; according to all parameters and an actual testing result of the tracking loop, a threshold value delta is selected; when a frequency discrimination result of the carrier loop is greater than the delta, the tracking loop is in a lock losing state; and when the frequency discrimination result of the carrier loop is less than the delta, the tracking loop is in a stable tracking state. The threshold value delta is obtained by the following steps that: on the premise that it is ensured that the carrier loop can stably track a signal frequency, frequency mixing multiplication operation is carried out on a signal ui (t) input by the tracking loop and a local periodic signal SI (t); FFT operation is carried out on the frequency mixing result so as to obtain a frequency spectrum two-dimensional diagram; and a maximum value of a frequency value corresponding to a peak value in the obtained frequency spectrum two-dimensional diagram is the threshold value delta.