The invention discloses a high-speed switch assembly platform for a ballast rail, which comprises a three-rail platform on a ballast bed. The three-rail platform consists of a first steel rail, a second steel rail and a third steel rail, wherein a three-way regulation sleeper supporting platform is arranged on the first steel rail and the second steel rail for placing front switch sleepers; a three-way regulation sleeper supporting platform is arranged on the first steel rail and the third steel rail for placing back switch sleepers; a two-way regulation sleeper supporting platform is arrangedon the second steel rail for placing the back switch sleepers; the three-way regulation sleeper supporting platform comprises a bottom plate, a raising plate, a connection channel steel, a longitudinal adjusting bolt, a transverse adjusting bolt and a vertical adjusting bolt; and the two-way regulation sleeper supporting platform comprises a bottom plate, a raising plate, a transverse adjusting bolt and a vertical adjusting bolt. The high-speed switch assembly platform for the ballast rail has the advantages of simple structure, low manufacturing cost and convenient use and operation, and canbe recycled; and the geometric dimensions of all parts of the assembled high-speed switch can satisfy the designed requirement.