In the rapidly developing modern football, the set piece is regarded as an important tool to score by all nations teams. In all kinds of set pieces, the swerving kick has the most precision. Because its flying path is like a banana, so it is also called Âbanana kickÂ. By detailed analyses in basic mechanics and fluidmechanics to the motion of the ball, this paper tries to provide the factors that formthe Âbanana kickÂ, with study on mechanical parametersÂ influence on the state of motion of the ball. Results reveal that: Banana kick simulated withMathematic by parameter equations based on mechanics model, is able to explain the classical theories about the flying path of football in mechanics and fluid mechanics, and serves the fundamental theories for this sport.