Method for improving high-cold-region mining waste residue field soil by yak excrement

The invention discloses a method for improving high-cold-region mining waste residue field soil by yak excrement. The method includes the steps: (1) directly applying 200kg/hm wet yak excrement tomining waste residue fields of high-cold grassy marshlands, laying dressing soil of 30 cm and covering films on the mining waste residue fields of high-cold grass marsh wetlands, and applying 200kg/hm mixture of the yak excrement, waste residues and soil; (2) sowing glass seeds suitable for growth in high-cold regions; (3) applying 100kg/hm wet yak excrement to the mining waste residue fields of the high-cold grassy marshlands again one month after; (4) continuing management and protection in the next year by a method as same as that of the last year. The method has the advantages that the yak excrement is applied to the high-cold-region mining waste residue fields, nutrients needed by herbage growth are sufficiently supplemented, the survival rate of herbages is greatly increased, the herbages effectively grows, con