Aiming at the disadvantages of slow measurement speed and low test efficiency due to various delay times such as operating system delay, bus communication delay, and software interrupt delay in the conventional switch control software coding implementation method, the present invention proposes a system using A multi-probe array microwave imaging system and a switch control method for a host triggering a pulse signal, including: a main control computer, a microwave signal transceiver and data acquisition device, a switch array, a multi-probe antenna transceiver array, and a switch control module. In addition to the start command, the entire control The process is realized by the trigger pulse of the hardware, without software intervention, which greatly improves the real-time performance and stability; the use of the hardware pulse signal effectively avoids the operating system delay, bus communication delay, and software interrupt delay in the software coding control process. Various delay times, such as time, realize the minimum delay control in the whole control process.