To protect the slope,penetrating frames，which have the effect of deceleration and accretion promotion,are laid on the slope surface for bank protection.Carrying out the experiments of bank protection by laying tetrahedron-like penetrating frame and twist double H permeable frame on the bank slope surface,we analyze the effect of bank protection and mechanism of deceleration and accretion promotion and recognize the advantages and disadvantages and the applying position of bank protection by penetrating frames.