The invention discloses a multi-polarization (linear polarization, left-hand circular polarization and right-hand circular polarization) reconfigurable microstrip antenna, which belongs to the technical field of microwave antennas. The multi-polarization reconfigurable antenna comprises a dielectric substrate, a metal grounding plate, a radiation patch, a switch and a tuning branch, wherein aftera corner of the radiation patch is cut, the radiation patch is connected with a section of transmission line through the switch, and reconfiguration between linear polarization and left-hand and right-hand circular polarization can be realized through changing a switch state. Fixed one-way feed is adopted, reconfiguration between linear polarization and left-hand and right-hand circular polarization can be realized through only introducing the single tuning branch, and the whole antenna has a simple structure. Compared with a multi-polarization reconfigurable antenna under control of multipleswitches, the antenna of the invention only uses one switch, the structure is thus simplified, the reliability is improved and the cost is further reduced. The multi-polarization reconfigurable antenna can be applied to radar and communication systems and other aspects and can be applied to an aircraft, a ship, a vehicle mounted device, and fixed or mobile terminal devices for wireless communication.