The invention discloses a method for improvement and protection of a
spur dike channel of a mountain river. The method comprises the steps that (1) the channel improvement
water level and the channel improvement
line width are determined according to the direction of the channel, the planned line form, the hydrological characteristics of the river, the riverbed components and the
erosion and deposition evolution characteristic, and (2) the position and the length of a
spur dike are determined according to the shipping hindering characteristic of a dangerous
shoal and the improvement
line width. The method for improvement and protection of the
spur dike channel of the mountain river is characterized by further comprising the steps that (3) a dike body structure is laid, wherein a layer of block shaped like the twisted Chinese character 'Wang' is laid on the downstream slope of a dike body; (4) the bottom of the head of the dike is protected; (5) the bottom of the root of the dike is protected; (6) a
bank protection structure is arranged. The method is particularly suitable for improvement and protection of the spur dike channel of the mountain river, the strength of the root of the dike and the strength of the head of the dike can be improved, stronger current
impact force can be resisted, the overall service life is prolonged, and the method has the advantages of being capable of preventing
sediment accumulation, stabilizing a riverbed, protecting the
ecological environment and achieving safe flood discharging.