The utility model discloses a titanium alloy micro -arc oxidation is work piece fixing device for equipment, including electrolysis trough, concatenation post, baffle, logical liquid trompil and support column, the outside of electrolysis trough is provided with the motor, splice the one end and the axis of rotation interconnect of post, and splice the other end and the fixed frame interconnect ofpost, the last mounting panel of installing of fixed frame, and pass through connecting axle interconnect between the mounting panel, the baffle passes through go -between and connecting axle interconnect, it sets up on the baffle to lead to the liquid trompil, the last card hole that is provided with of fixed frame, the support column passes through mounting and fixed frame interconnect, and passes through anchor strut interconnect between the support column, the inner wall interconnect of bearing and electrolysis trough is passed through to the axis of rotation. This titanium alloy micro -arc oxidation is work piece fixing device for equipment can carry out the micro -arc oxidation at all -round no dead angle to the titanium alloy, and fixed mounting's process is more convenient, and the fixed ten minutes of work piece is stable, convenient to use.