When the operating waterway needs to be widened or deepened for dredging，the frequent avoidance of construction ships and operating ships often leads to high safety risks and low construction efficiency. In this situation，the ship safety avoidance and efficiency improvement measures are studied，that is，the calculation method of the effective width of the channel is adopted，and the scientific and effective avoidance measures are adopted through the construction and navigation check to solve the problem that the rake suction ship frequently leaves the channel to avoid the problem. We develop blocking rake fast mud removal device and rake head anti-slip rake device of TSHD，which respectively solve the technical problems such as the difficulty of cleaning the raking and raking in the construction of TSHD，and the low efficiency of slope construction. Practice has proved that the measures are feasible.