Abstract: In order to solve the problem of gas accumulation and overrun in the process of mining the low-permeability soft single coal seam, we take YuWu’s low permeability soft single coal seam 3# as research objects, by studying gas emission characteristics of the typical working face, master the correlation of pressure and gas emission, determine the main source of gas emission in working face, propose and complete the construction of the horizontal pinnate branch well, investigate and evaluate the drainage effect of the horizontal pinnate branch well.