The invention provides a compact low cross polarization microstrip antenna, which comprises a dielectric plate, a radiation sheet, a metal ground, a metallized hole and a feed interface, wherein the metal ground is arranged on the lower surface of the dielectric plate, the radiation sheet is arranged on the upper surface of the dielectric plate, and the metallized hole is formed in the radiation sheet and is connected with the metal ground; an outer conductor of the feed interface is connected with the metal ground, and an inner conductor of the feed interface penetrates through the dielectricplate and is connected to the radiation sheet; the radiation sheet is provided with two gaps, and the two gaps divide the radiation sheet into three parts, namely, a first radiation sheet, a second radiation sheet and a third radiation sheet; and the first radiation sheet and the third radiation sheet are in mirror symmetry about the symmetry axis of the second radiation sheet. According to the invention, the advantages of simple and compact structure are retained, and the cross polarization of the traditional short-circuit microstrip antenna can be greatly improved. Meanwhile, compared withthe traditional short-circuit microstrip antenna, the short-circuit microstrip antenna has a smaller size and is suitable for a radio frequency front-end antenna needing low cross polarization characteristic in a wireless communication system.