The utility model discloses to solve the single bottom plate angle adjusting mode in the existing curve saw, and the difficult replacement adjustment problem, provide a kind of bottom plate adjusting replacement structure and curve saw of curve saw, wherein bottom plate adjusting replacement structure, including bottom plate, still include replacement locking structure, compression plate and
locking plate, locking structure includes compression rod and adjusting
assembly;Wherein
locking plate is fixedly arranged in the bottom of the shell of curve saw, close to the part of saw blade in curve saw;
Locking plate and bottom plate are attached, and the attachment surface of
locking plate and bottom plate is the curved surface of cylindrical shape;Compression plate is set in the side of bottom plate away from locking plate;Compression rod passes locking plate, bottom plate and compression plate in proper order;Adjusting
assembly cooperates with compression rod, controls compression rod activity, adjusts the pressure between compression plate, locking plate and bottom plate;Through replacement locking structure, so that user experiences different adjustment
control mode with lower replacement cost, also reduce manufacturer production cost.