The invention discloses a grinding and disassembling fixing clamp for guide vanes of aero-turbines. According to the grinding and disassembling fixing clamp, two vane fixing devices which are symmetrically arranged relative to the center of a clamping turntable are arranged at the upper end of the clamping turntable, the turbine guide vanes to be maintained can be conveniently fixed and clamped through the fixing devices, each vane fixing device adopts a positioning block, an adjusting support, a swing bolt, an eccentric wheel and a fixing clamping plate, and therefore the structure is simple,installation is rapid and convenient; the clamping turntable is fixedly arranged on a fixing chassis, due to the fact that the positions of welding spots of the turbine guide vanes are not uniformlydistributed, the position of a worker does not need to be moved in the grinding process, the rotation of workpieces can be realized by directly rotating the clamping turntable so that the grinding angle can be adjusted, and therefore the structure is simple and use is convenient; and profiles of the upper surfaces of the positioning blocks are matched with edge plates profiles of the turbine guidevanes, the eccentric wheels are forked type eccentric wheels, the positioning blocks and the fixing clamping plates are made of MC nylon materials,and therefore parts can be quickly aligned and installed and can be effectively protected from being damaged in the disassembling process.