A Massive MIMO antenna is disclosed, comprising a power distribution network module, a coupled calibration network module and multiple radiation sub-arrays. The power distribution network module comprises a first divider, and multiple first dividers are coupled to multiple radiation sub-arrays. The coupled calibration network module comprises a PCB board. A coupled calibration network is formed on the PCB board and includes a calibration port, multiple main signal channels and multiple coupled signal channels. The outputs of the main signal channels are respectively coupled to multiple first dividers. Multiple filters and multiple radio frequency connectors are provided on the PCB board. The inputs of the main signal channels are coupled to the outputs of the filters, and the outputs of the radio frequency connectors are coupled to the inputs of the filters. The Massive MIMO antenna realizes the miniaturization and lightweight of the 5G base station antenna system, which is conducive to 5G device mass production.