High-efficiency GPS P code signal accurate interference method and system

The invention discloses a high-efficiency GPS P code signal accurate interference method and a high-efficiency GPS P code signal accurate interference system. The method comprises the following steps: S1, receiving all current visible GPS satellites; s2, acquiring the position of an enemy navigation receiver; s3, according to the received ephemeris of the GPS satellite, calculating the position and clock correction of the GPS satellite corresponding to any moment; s4, according to the distance between the position of the GPS satellite and the position of the navigation receiver and the clock difference, calculating the transmission time delay of the P code signal reaching the enemy navigation receiver; s5, generating a P code signal of the GPS at the current moment and any pseudo-random sequence with the code rate of 480Kcps according to the transmission time delay; s6, generating a matching spectrum interference signal according to the P code signal of the GPS at the current moment and the pseudo-random sequ