The invention belongs to the technical field of microstrip array antennae and particularly relates to a super-surface based variable-polarization multifunctional microstrip array antenna. The microstrip array antenna consists of a feed source and a microstrip array, wherein the feed source is arranged at a focus of the microstrip array; the feed source is a broadband Vivaldi antenna, adopts microstrip coupled feed, and consists of upper slotting metal, a middle dielectric plate and a lower microstrip line; the microstrip array consists of N*N GMS units; each GMS unit is composed of three layers of metal structures and two layers of dielectric plates; each layer of metal structure is obtained by etching CDSRRs with different rotational angles on a square patch; the upper, middle and lower structures are identical in parameter; and only the CDSRRs are clockwise rotated at an angle of 45 degrees in sequence. According to the antenna, a reflection function and a transmission function are integrated, the function switching among the reflection function, a bidirectional radiation function and the transmission function of the microstrip array is realized, and the polarization state switching between a co-polarization state and a cross-polarization state is realized. The antenna has the characteristics of high reusability, high integration level, numerous functions and the like.