The invention discloses a dual-linear polarization and dual-circular polarization four-port reconfigurable dielectric resonant antenna, and belongs to the field of wireless communication. The antennasequentially comprises a circular dielectric block, two layers of dielectric blocks, a dielectric feed plate, a dielectric substrate, a coaxial probe and a bottom feed network from top to bottom. Thelower part of the circular dielectric block is fixed with the dielectric substrate through a dielectric feed plate, and a coaxial probe passes through a through hole at the fixed connection part. Thetwo layers of dielectric blocks are fixed in the center of the dielectric substrate, and a gap is reserved in the center of the dielectric substrate. Bottom feed networks are distributed on the lowersurface of the dielectric substrate, and each corner is provided with a port. The circular dielectric block is connected with a bottom feed network through a coaxial probe and correspondingly connected with a first port and a fourth port, linear polarization is excited, and the feed ports are switched to achieve reconfiguration in the horizontal polarization direction and the vertical polarizationdirection. And the two layers of dielectric blocks are coupled with the bottom feed network through gaps, are correspondingly connected with the second port and the third port, excite circular polarization, and switch the feed ports to realize reconfigurable left-handed and right-handed circular polarization. According to the invention, various reconfigurable configurations are realized.