Aiming at the condition that there are many the momitoring signals in the monitor system,this paper introduces a multi-channel digital signal collecting module which takes FPGA.This module collects low or high state of the digital signals and one of the signals’ frequency,collects the pulse signals’ delay and width.The FPGA makes data into frame structure then uploads to the computer.With the characteristic of FPGA and mass capability FIFO,we design the circuit of optoelectronic coupler, FIFO and configure of FPGA.We can control and communicate the module with PC real-time within USB2.0 interface. The design scheme is easily modified, controlled and high reliability.