Supporting seat used for bore lengthening eccentric hole

The utility model discloses a supporting seat used for a bore lengthening eccentric hole. The supporting seat used for the bore lengthening eccentric hole comprises a base seat. V-shaped supports are respectively installed at two end portions of the base seat in a snail mode. A main-shaft neck-hole support and a crank-throw neck-hole support are fixed on the base seat between the V-shaped supports through bolts. A first nylon bush sleeve is arranged on the main-shaft neck-hole support, and a second nylon bush sleeve is arranged on the crank-throw neck-hole support. According to the supporting seat used for the bore lengthening eccentric hole, after clamping a cutter bar, the main-shaft neck-hole support and the crank-throw neck-hole support are arranged; the heights and the eccentric distances of the main-shaft neck-hole support and the crank-throw neck-hole support can be adjusted according to the condition of the cutter bar. Supporting function to the cutter bar can be achieved through the V-shaped supports