The invention discloses a ground penetrating radar distributed filtering method based on an FPGA, and belongs to the technical field of signal processing of ground penetrating radars. The problem thatthe signal processing efficiency is low when an existing filtering method is achieved in an FPGA is solved. According to the invention, a distributed algorithm is applied to realize digital filteringin the FPGA; the distributed structure utilizes the characteristic that binary data can be processed bit by bit. The same bit of the input data is taken as an address to search a pre-addition resultpre-stored in advance; shifting operation is carried out on the partial product output by the lookup table; according to the method, rich memory resources are used for replacing limited hardware multiplier resources, and quick table look-up operation and shifting operation are used for replacing slow multiplication operation, so that the problem that the signal processing speed is low in the existing method is solved. The method can be applied to the technical field of signal processing of ground penetrating radars.