The invention discloses a metasurface lens capable of transverse multi-point focusing and a realization method therefor. The metasurface lens is partitioned into sub-wavelength square array units, each square unit is further divided into square pixel units with reduced sizes. A slit formed by certain pixels in a set length breadth ratio is nested in each sub-wavelength square unit. Twice the azimuth angle orientation of the slip corresponds to a phase modulation value of the unit. The phase modulation value is formed via superposition of two parts, a spherical wave which changes along a radialdirection is generated via a part of the phase modulation value while the other part of the phase modulation value which changes along an azimuth angle direction is determined based on a Fourier transform phase shift theorem. The slit, of which the azimuth angle orientation is determined, in each sub-wavelength square array unit is made into a titanium dioxide cuboid array metasurface lens with corresponding orientation. Multi-point focusing in a focal plane can be realized via circularly polarized light incidence.