Abstract: Aiming at the problems of imperfect fault diagnosis functions and inefficient protecting measures of main ventilator of coal mine at present,the paper proposed a design scheme of measuring system for fault parameters of main ventilator of coal mine based on information fusion technology.It briefly analyzed common faults of main ventilator and information fusion technology,determined measuring method of fault parameters,and introduced hardware and software design of the system in details.The actual application showed that the system realizes real-time and on-line measurement for each fault parameter,which provides technical support for reliable running of main ventilator.