Abstract: The need of fly-ash is large and its cost is high as traditional stowing material.The feasibility of loose which exist extensively in Northwest area as stowing material was research.Proportion of new-style stowing material was obtained by 5-factor and 4-level orthogonal test in which taking loose，fly-ash as major ingredient，cement and limb as auxiliary ingredient，and adding some additive.The influence of every factors on main index was analyzed.Test results were showed as follows.It was feasible that taking loose as stowing.Rational loose fly-ash slurry concentration was 60%-65%，quality ratio of loose and fly-ash was 1∶1.5-1∶3，auxiliary ingredient＇s quality ratio was 30%-33%，additive was 5%-7%，and conserving time was 28 days.