Provided is a satellite navigation signal intermediate-frequency sampling apparatus which belongs to the technical field of satellite navigation. The satellite navigation signal intermediate-frequency sampling apparatus solves a problem that a conventional satellite navigation signal receiver is realized by using a special chip and cannot be detached, and a hardware device needs to be replaced when soft update is performed on the receiver. The satellite navigation signal intermediate-frequency sampling apparatus includes an antenna for receiving a satellite navigation signal, and further includes a low-noise amplifier, a radio frequency band-pass filter circuit, a phase-locked loop frequency multiplier circuit, a temperature compensated crystal oscillator, a frequency mixing circuit, an intermediate-frequency filter circuit, an automatic gain amplifier, an AD converter, a bit width converting circuit, a data buffer memory circuit and a USB interface. The satellite navigation signal, after being processed by a series of circuits, is directly transmitted to the satellite navigation signal receiver through the data uploaded via the USB interface. The satellite navigation signal intermediate-frequency sampling apparatus is used for processing a satellite navigation signal.