A filter feeding network, comprising: a dielectric substrate, wherein a surface of one side of the dielectric substrate is provided with a microstrip line, and a surface of the other side of the dielectric substrate is provided with a metal ground; the microstrip line comprises first and second power division circuits (21, 21'), and the first power division circuit comprises a first filter circuit and the second power division circuit comprises a second filter circuit; an input end of the first filter circuit is connected to an input end of the first power division circuit, an input end of the second filter circuit is connected to an input end of the second power division circuit, and the input end of the first filter circuit and the input end of the second filter circuit are in conduction with the metal ground; and the output end of the first filter circuit is configured to feed at least two array antenna units for -45° polarization, and the output end of the second filter circuit is configured to feed at least two further array antenna units for +45° polarization; characterized in that the first filter circuit comprises a first low-pass filter and a first band-pass filter, and the second filter circuit comprises a second low-pass filter and a second band-pass filter; an output end of the first band-pass filter is connected to an input end of the first low-pass filter, an input end of the first band-pass filter is connected to the input end of the first power division circuit, and an output end of the first low-pass filter is connected to the output end of the first filter circuit; and an output end of the second band-pass filter is connected to an input end of the second low-pass filter, an input end of the second band-pass filter is connected to the input end of the second power division circuit, and an output end of the second low-pass filter is connected to the output end of the second filter circuit; wherein each of the first band-pass filter and the second band-pass filter comprises a first microstrip having a first end and a second end, and further comprises a second microstrip having a third end and a fourth end, wherein the first end and the third end are connected at a first opening end, and wherein the second end and the fourth end are connected at a second opening end, and wherein the the first opening end and the second opening end are spaced apart, and wherein the first microstrip and the second microstrip are nested such that the first microstrip has a first hexagonal opening and the second microstrip has a second hexagonal opening. a dielectric substrate, wherein a surface of one side of the dielectric substrate is provided with a microstrip line, and a surface of the other side of the dielectric substrate is provided with a metal ground; the microstrip line comprises first and second power division circuits (21, 21'), and the first power division circuit comprises a first filter circuit and the second power division circuit comprises a second filter circuit; an input end of the first filter circuit is connected to an input end of the first power division circuit, an input end of the second filter circuit is connected to an input end of the second power division circuit, and the input end of the first filter circuit and the input end of the second filter circuit are in conduction with the metal ground; and the output end of the first filter circuit is configured to feed at least two array antenna units for -45° polarization, and the output end of the second filter circuit is configured to feed at least two further array antenna units for +45° polarization; characterized in that the first filter circuit comprises a first low-pass filter and a first band-pass filter, and the second filter circuit comprises a second low-pass filter and a second band-pass filter; an output end of the first band-pass filter is connected to an input end of the first low-pass filter, an input end of the first band-pass filter is connected to the input end of the first power division circuit, and an output end of the first low-pass filter is connected to the output end of the first filter circuit; and an output end of the second band-pass filter is connected to an input end of the second low-pass filter, an input end of the second band-pass filter is connected to the input end of the second power division circuit, and an output end of the second low-pass filter is connected to the output end of the second filter circuit; wherein each of the first band-pass filter and the second band-pass filter comprises a first microstrip having a first end and a second end, and further comprises a second microstrip having a third end and a fourth end, wherein the first end and the third end are connected at a first opening end, and wherein the second end and the fourth end are connected at a second opening end, and wherein the the first opening end and the second opening end are spaced apart, and wherein the first microstrip and the second microstrip are nested such that the first microstrip has a first hexagonal opening and the second microstrip has a second hexagonal opening.