There have important science meaning in studying vertical distribution characteration of reservior energy and bearing-gas system quality.On basis of petroleum geology and coalbed methane exploration practise,take coal bed reservoir air permeability 1×10-3μm2 (or in-situ permeability 0.1×10-3μm2) as the threshold value of dividing unified pressure gas-bearing system(UPGS) and no unified pressue gas -bearing system(NUPGS),different quality of gas-bearing system have different presence in reservoir energy.Based on analytical date of coal and rock physical property from borehole of Zhina coal field in wester Guizhou province,the results show that:the porosity-permeability of presentative rock was very bad.The coal developing in third-sequence boundary which air permeability is less than 1×10-3μm2, the adsorption is very strong, form NUPGS,the other coal beds individually form UPGS.When there develop more UPGS in vertical direction of multi-coalbeds,the coal beds which have bigger reservoir energy and higher lateral pressure surface should been preferentially explored.Determinant of vertical distraction from multi-coalbeds reservoir energy is permeability of coal measure,the main factor of rock which physical property becoming less is particular diagenesis in acidic enviroment of coal measure. The coal developing in MFS have more vitrinite,and so have better porosity-permeability,which easily form UPGS.The morden tectonic stress field influence the permeability of coal reservoir.Multi-coalbeds of Liupanshui is typical NUPGS,but muliti-coalbeds or individual coal bed of some ares in Zhina is UPGS.