Abstract: The effect of high stress soft rock roadway support is related to the safe mining of coal mine, in which the roadway peripheral rock fissure evolution law is the key to guarantee the stability of the roadway. Taking 9102 auxiliary roadway and transportation roadway of Sanjusheng coal mine as an example, we analyzed the peripheral rock fissure development law of the original support, and put forward the layered synergistic control technology of fixed-length anchor support theory and carried out the analysis of application effect. The engineering experiments show that compared with the original support, the deformation of the top plate, two gangs, left vault and right vault is reduced by 69.01%, 65.53%, 55.91% and 66.03% respectively; the top plate of the coal seam and the surrounding rock are smooth and even, and there is no obvious fissure development on the surface, and the maximum depth of fissure is reduced from 8.14 m to 3.05 m. The maximum depth of fissure is reduced from 8.14 m to 3.05 m. The top plate of the coal seam and the surrounding rock is smooth and even, and there is no obvious fissure development on the surface.