The invention discloses a graphene metasurface construction method used for spin angular momentum deflection in a two-dimensional direction. The method is applied to a computer device and comprises the following steps of: constructing a graphene reflection unit which comprises a graphene patch at the uppermost layer, a quartz dielectric plate at the middle layer and a metal floor at the bottom layer; inputting the number of graphene reflection units required by the graphene metasurface to be constructed; calculating the phase distribution of each position of the graphene metasurface to be constructed to determine the arrangement positions of all graphene units forming the graphene metasurface; and combining all the graphene units into the graphene metasurface according to the arrangement positions of all the graphene units of the graphene metasurface to be constructed. According to the embodiment of the invention, the graphene reflection unit is used for constructing the graphene metasurface, and the spin angular momentum and the deflection direction of electromagnetic waves in the two-dimensional direction can be controlled.