The invention relates to a method for solidifying and repairing sludge, in particular to a sludge modification-repair integrated system based on electrochemical treatment and an application. The sludge modification-repair integrated system based on electrochemical treatment comprises an electrode tube 1, an electrode tube 2, a conductive wire, a direct current power supply, a liquid passage tube,a liquid inlet tube, a liquid outlet tube, an electrolyte cell, and an electrode switch. The electrode tube (1) and the electrode tube (2) are respectively connected with the direct current power supply through the conductive wire, and the positive and negative electrodes of the electrode tube are adjusted through the electrode switch. The electrode tube (1) and the electrode tube (2) are arrangedin a hexagonal shape, the electrode tube (2) is arranged at a central point of the hexagonal shape, and the electrode tube (1) is arranged at a vertex of the hexagonal shape. The electrode tube 1 andthe electrode tube 2 are filled with electrolyte, and the function of the system is adjusted by different energizing modes and the backfill material control system around the electrode tube, so as torealize the reinforcement and improvement of the high moisture content sludge and the remediation and treatment of the contaminated sludge.