The invention discloses an adaptive maximum intermediate frequency energy tracking radar receiving system, and the system comprises a radio frequency front end, a triggering board, an intermediate frequency amplifier board, and a radar terminal. The radio frequency front end comprises a low-noise amplifier, a double-balance frequency mixer, and a local oscillator. The triggering board comprises a microprocessor, a programmable gate array, a signal buffering processing module, an analog-digital conversion module, and a digital-analog conversion module. The intermediate frequency amplifier board comprises an energy voltage conversion circuit, a low-noise intermediate frequency amplification circuit, a band-pass filter circuit, a logarithmic amplification detection circuit, and a push output circuit. The radar terminal comprises a terminal processing display module. The invention provides a brand-new receiving system based on maximum intermediate frequency energy tracking, completely changes a mode of automatic frequency control of a conventional navigation radar receiving system, and effectively solves a problem that a conventional mode of frequency tracking causes the decrease of capability of finding a small object because of the frequency spectrum change of a radar transmitter magnetron. The digitalization of the radar receiving system improves the reliability and expansibility of the radar receiving system.