The utility model discloses a 4G multi-mode five-frequency combiner. The left side of a resonant cavity is provided with a coupling test port and an ANT port. A CDMA port includes seven high-power resonant capacitors which are coupled in the form of windowing. A GSM900 port includes seven high-power resonant capacitors and three remote out-of-band rejection control elements, and the remote out-of-band rejection control elements are mainly used for controlling the out-of-band spurious frequency material to be copper. An LTE port includes six high-power resonant capacitors. A WCDMA port includes seven high-power resonant capacitors and a capacitive coupling window. A GSM1800 port includes six high-power resonant capacitors and an inductive coupling window. The 4G multi-mode five-frequency combiner has the characteristics of small dimension, beautiful design, low cost, convenient processing, and smooth signal transmission. Specially designed for harsh environments, the 4G multi-mode five-frequency combiner has a long service life and is convenient to install and maintain.