The invention relates to a beam scanning microstrip planar reflection array antenna based on a microcrystal material and a fabrication method of the beam scanning microstrip planar reflection array antenna, which are mainly used for solving the technical problems of low power capacity and low working frequency band in the prior art. The beam scanning microstrip planar reflection array antenna comprises phase shift units, beam scanning devices and a feeding source, wherein the phase shift units are arranged right below a microstrip reflection array and are in contact with the microstrip reflection array, the beam scanning device are correspondingly connected with the phase shift units, the feeding source is connected with the beam scanning device and is arranged right below the microstrip reflection array, the phase shift units are liquid crystal units and are used for connecting an input/output end of the antenna, and the beam scanning devices are used for providing external bias for the phase shift units. By the technical scheme, the problem is solved very well, and the beam scanning microstrip planar reflection array antenna can be used for a communication and radar system.