The invention provides a mesh machining device and method. The device comprises a control system, a wire feeding system connected with the control system, a straightening system, a forming system andan auxiliary system. The wire feeding system comprises an automatic-feedback wire feeding frame, a wire feeding wheel and a wire guiding pipe. The straightening system comprises a wire rotation disc,a horizontal straightening mechanism and a vertical straightening mechanism. The wire guiding pipe conveys a wire straightened by the straightening system to the wire feeding wheel, and the wire feeding wheel conveys the wire obtained after straightening treatment to the forming system. The forming system comprises a bending mechanism and a cutter, the bending mechanism is used for conducting bending forming on the wire obtained after straightening treatment, and the cutter cuts the wire obtained after bending forming. The auxiliary system comprises a lifting device and an auxiliary pressing rod fixed to the lifting device, and the auxiliary pressing rod is used for pressing and limiting the bent formed wire. The auxiliary system further comprises an automatic printing device, and after machining is finished, marks of components can be automatically printed. By utilization of the mesh machining device and method, a huge number of meshes with any shape can be automatically machined andmanufactured, the product machining speed is high, and precision is high.