Comparing to the conventional oblique pile，all-vertical-piled structure bears the horizontal load completely by its own bending resistance，the pile diameter is larger，the vertical bearing capacity is not fully developed and investment is higher under the same stress condition. Aiming at this problem，we propose a new type of all-vertical-piled pile structure with horizontal steel truss，take the certain engineering mooring pier as an example，use the space model for calculation and analysis，and determine the optimal structure scheme，and apply the horizontal steel truss to connect the pile foundation in the middle position of pile foundation. The results show that adding horizontal steel frame can increase structural stiffness，reduce pile diameter，control structural displacement，give full play to the role of rock socketed pile，and has obvious economic advantages.