Slide bearing with grooves and lubricating method

The invention discloses a slide bearing with grooves and a lubricating method, wherein the slide bearing with grooves comprises an inner hole and an excircle; an inner groove is arranged in the middle of the inner hole and two ends of the excircle are provided with outer grooves; the outer grooves are provided with permanent magnets; a magnetofluid hole is formed between each outer groove and the middle of the slide bearing; the permanent magnets are annular permanent magnets; each outer groove is internally provided with a plurality of annular permanent magnets which are separated by permanent magnet baffle rings; and elastic baffle rings are arranged between the annular permanent magnets and axial end surfaces of the outer grooves. The tensioning degree among the magnets is regulated by regulating the number or widths of the elastic baffle rings among the magnets, the operation comprises the following step that water-based magnetic fluid lubricating agents are injected between the slide bearing and a matche