The invention discloses a detection system for a beam control circuit of a phased array radar antenna, and an implementation method for the detection system, and mainly solves problems in the prior art that the testing is tedious, the detection cost is increased and the detection efficiency is low. The system comprises an upper computer, an FPGA chip connected with the upper computer, an interfacecontrol module which is disposed in the upper computer, a test control module which is connected with the interface control module, a command analysis module which is connected with the test controlmodule, a command generation module which is connected with the command analysis module, and a serial port communication module connected with the FPGA chip. The test control module comprises a DA read-write module, a channel amplitude and phase control module, a system self-check module, a beam control algorithm verification module, a power pulse control module, a beam control circuit flash memory control module, and an attenuation amplitude control module, wherein the DA read-write module, the channel amplitude and phase control module, the system self-check module, the beam control algorithm verification module, the power pulse control module, the beam control circuit flash memory control module and the attenuation amplitude control module are connected with the command analysis module,and the serial port communication module is connected with the FPGA chip. The system is simple and convenient to operate, is good in compatibility, is complete in test items, and is high in test efficiency.