The invention relates to a control method of spartina alterniflora, belonging to the technical field of 
ecological engineering. Spartina alterniflora is artificially introduced in China in the 1980s, and plays a positive role for damping 
waves, protecting slopes, promoting deposition and reclaiming lands on Chinese coastline, however, as an alien 
invasive species recognized internationally, the 
population characters of powerful breeding and rapid extending ability of the spartina alterniflora bring a series of negative effects to the natural wetlands 
ecosystem of Chinese coastal tidal land and the regional 
biodiversity; and control of the spartina alterniflora is already a universal problem. The prior single physical, biological or 
chemical control method has the disadvantages of low efficiency, high environmental 
pollution risk, low 
ecological safety, high cost and unobvious 
control effect. The invention overcomes the disadvantages of the prior preventing and controlling techniques, and utilizes the comprehensive control method of cradling and 
water level regulating, eradicates the 
invasive species and controls the growth and rapid extension of the 
invasive species through restraining the growth of spartina alterniflora, plays an active restoring role to the ecological 
system destroyed in large areas, and provides an efficient path for preventing spartina alterniflora from spreading extensively in coastal areas.