The present invention relates to a quick fit mechanism for power harrow blade having an easily replaceable power harrow blade assembly (1) carried by a rotor to transmit power and rotation using the driving shafts (7, 10, 13) and various gears (8, 9, 11, 12, 14) to rotate the power harrow blade (2) to cultivate the soil of land. The power harrow blade assembly (1) comprises at least a pair of power harrow blades (2) which are mounted at the fixed angle on the rotatable blade mount housing (3) each one fastening with a double pin (4) fastened in the holes of the power harrow blade (2) and blade mount housing (3), the double pin (4) having a single pin (5) as a supporting part which is locked by a linchpin (6) thereby inserting in the hole of single pin (5) to hold the power harrow blade assembly (1). The assembly of the power harrow blades (1) reduces maintenance time by quick replacing the power harrow blades (2) and increases the field efficiency.
