In order to explore the optimal design parameter and layout scheme of a hydraulic flashboard permeable spur dike with the minimum scour depth at the jetty head, single factor experiments were carried out by changing the discharge, the jet angle, the water permeable rate, and the length of the spur dike. The regression equations between each single factor and the scour depth at the jetty head were obtained. The best test level in each group of single factor test results was chosen and an orthogonal experiment with four factors and three levels was designed using the L9(34)orthogonal experiment design table. The experimental results show that the four single factors influence the scour depth at the jetty head of the hydraulic flashboard permeable spur dike in the following descending order: the water permeable rate of the spur dike, the discharge, the length of the spur dike, and the jet angle of the spur dike. With a certain discharge, the design parameters of the optimal layout scheme of a hydraulic flashboard permeable spur dike are as follows: the water permeable rate of the spur dike is 30%, the length of the spur dike is 30 cm, and the jet angle of the spur dike is 60°.