Verilog硬件描述语言能够用软件语言的的方式描述硬件特性，并可用仿真方式完成电路的调试.本文介绍了基于EasyFPGA030的开平方运算器的设计，详细说明了运用verilog语言的设计过程与实现成果。-Verilog hardware descr iption language（HDL）specializes in describing hardware in the way of software language, and complete circuit simulation available are introduced. This thesis include the design of　square root machine which is based on the EasyFPGA030 ,as well as the details of the design process Verilog language use and achieve results.