In order to realize non-mechanical beam intelligent control based on liquid crystal spatial light modulator, a test system is built with silicon-based liquid crystal spatial light modulator whose pixel number is 1920×1080. The system can obtain the single beam with large angle, high diffraction efficiency, continuous steering in space, divide the incident light beam into 2, 3, 4, 5 beams and control deflection angle of each beam separately. Phase modulation principle and theoretical model of the spatial light modulator are introduced. The beam deflection control function and the beam splitting function are verified. The light path and the principle of the test system are analyzed. Finally, we sum up the test results and put forward the suggestion and prospect.