The invention relates to an ultra-wideband micro band rejection filter, comprising an input / output interface suitable for pasting on a surface, five parallel resonance units and four series resonance units, the structure is implemented by multi-layer low-temperature co-fired ceramic technology. According to the invention, the ultra-wideband micro band rejection filter has the advantages of wide frequency coverage, small insertion loss, light weight, small volume, high reliability, good electrical property, good phase frequency characteristic linearity, good temperature stability, good batch consistency of electrical property, low cost and mass production; therefore, the ultra-wideband micro band rejection filter is particularly suitable for fields such as communication for corresponding microwave frequency range, a digital radar and a wireless communication hand-held terminal which have excessive demands on volume, electrical proper, temperature stability and reliability, and corresponding systems.