The invention discloses a micro-wave low-band ultra-micro power combiner, which is characterized in that a circuit composition comprises power dividers with a tree structure, more than or equal to 2 of multi-channel balanced amplifiers, and combiners with a tree structure, wherein each balanced amplifier consists of an IC amplifying device and two 3dB quadrature bridges, the power dividers, the combiners, the 3dB quadrature bridges in the balanced amplifiers, and peripheral circuits of the IC amplifying devices in the balanced amplifiers are produced on a ceramic substrate, and the IC amplifying devices are fixed on the ceramic substrate through wedge bonding. Circuits of a radiofrequency power combiner are produced on the ceramic substrate, the IC amplifying devices are fixed on the ceramic substrate through wedge bonding, the circuits have good consistency and the power combiner has the advantages of high gain, high integration level, high efficiency, small volume and so on, and the power combiner, is suitable for mass production, greatly reduces production cost, and is suitable to be applied to base station transmitters and small whole machines in the field of microwave communication.