Abstract: in order to improve a seam c lling ratio.based on the site geoseeing requirement and fechnical dificuties a systemaic geosteering principle and method of the seam muri branch wels were summarzed.The steering technology of the landing and horizontal secion was analzed.The geosteering working procedure and the real tie tracing adjustment steering nethod were established and the geosteering technology of the coalbed methane mutif branch wells wasprovided.Nith the application case of Z0A-1H well in Zhengzhuang Block.the suitability and aplicaion efect of thecoalbed metihane muti branch well geoseeing method were veifed.The well bore racing wa sucestilly adjusted tvice,the wel bore drlld through foorwas retuned to the sean and the trllig vas successul complefed.The total driling footage was 5 257 m,the total illing in sean was 3 673 m and the seam driling ratio was85.14%. The geosteeing technology would havecertain guidance significances to the multi branch wells in the block.