A method to design the metasurface‐based splitter with dual beams which have different power distributions, polarizations, and radiated angles is proposed. The presented metasurface is ultrathin which is only 0.12λ and the whole unit cell is mainly composed of receiving antenna with single‐polarization, power divider, dual‐channel phase shifter with independent control and transmitting antenna with dual‐polarization. According to the functional requirements of the beam splitter, the main components which are power divider and phase shifter can be artificially tailored correspondingly. And the fixed design of receiving and transmitting antennas can receive the incident electromagnetic (EM) wave with single‐polarization and transmit the EM wave with dual‐polarization, respectively. Comparing with conventional cascaded transmitarray and bulk lens, the design logic of proposed whole splitter is very clear that scanning and optimizing massive parameters of unit cells for satisfying the demands of polarization, transmission phase, and power distribution simultaneously is not needed. The good consistent results of experiment and simulation can verify the validity of our design.