JSN2B mud purifier is a kind of mud treatment equipment commonly used by geological prospecting units. Because the vibration is produced by eccentric block driven by motor belt transmission for the vibrating screen system, it is inconvenient to maintain the equipment and replace the sieve mesh in the practical application, which affects the normal use of the purifier. Through research and analysis, the vibration motor and composite sieve mesh were adopted to transform it. The actual use of one year proves the good effect, convenient maintenance and significantly improved benefit.