The invention provides a manufacturing method and device of a high-wear-resistance composite switch rail, and the method comprises the steps: building a rail model in combination with a mixed scanninginstruction and an assembly method of three-dimensional software, and building a wheel rail solid model based on the rail model and a wheel set; performing finite element mesh division on the wheel track solid model by using finite element analysis software to obtain a finite element model, and performing attribute setting; applying finite element analysis software to run the set finite element model to obtain stress distribution information of the set finite element model; obtaining the finite element grids of which the stress is higher than a preset stress threshold value in the finite element grids corresponding to the switch rail model to obtain a switch rail cutting part; manufacturing a switch rail based on the switch rail model; cutting an area corresponding to the point rail cutting part on the point rail to obtain a cut point rail; and supplementing the cut switch rail by using a high-strength alloy material through a 3D printing technology to obtain the composite switch rail.