The invention discloses a stored program control exchange user board maintenance and detection device. The stored program control exchange user board maintenance and detection device comprises a central control unit, a signal generation and output unit, a signal compare and detection unit, a display unit, a test synchronously auxiliary unit, a test signal jumping connection unit, a test interface unit, a test probe, a signal acquisition and processing unit and a power source unit. The stored program control exchange user board maintenance and detection device aims at the problem that a large quantity of stored program control exchange user boards in the current market cannot be repaired on site in short time or cannot test after being repaired when being damaged, creatively combines the signal source technology, the computer control technology, the signal acquisition technology and the signal detection and processing technology, achieves on-site maintenance and detection of the stored program control exchange user boards, solves the problem that maintenance through the stored program control exchange user board technical support mechanisms is difficult and reduces maintenance costs.