The invention relates to an intelligent back-up system of a roller bed furnace drive control part. The intelligent back-up system is arranged in a main control cabinet of the roller bed furnace. An industrial personal computer, a programmable controller, a contactor, a frequency converter and a circuit breaker are respectively and electrically connected to the intelligent back-up system. When thedrive control part fails to work, the intelligent back-up system carries out intelligent determination and a corresponding running frequency is set for a standby frequency converter; a main fault loopis cut off and a standby loop is put into operation; when the fault loop is processed normally, the standby loop automatically exits from the operation and restores to the standby state, the workingcircuit starts to work automatically, and the entire control system is automatically restored to a normal state. According to the invention, the automatic operation is performed; the time of entranceand exit of the back-up system in the fault handling process is greatly shortened; the automation capability of the production is enhanced; the labor costs are lowered; the yield and quality of products are stabilized; and the stability and reliability of production are ensured.