This　paper　investigates　on　the　optimization　design　of　a　new　type　of　hydrodynamic　bearing　with　multiple　spiral　oil　grooves.　The　mechanical　behavior　and　stability　of　the　new　bearing,　which　includes　pressure　distribution,　Sommerfeld　number　and　attitude　angle,　have　been　obtained　through　solving　Reynolds　equation.　The　analysis　and　calculation　show　that,　among　the　hydrodynamic　bearings　with　multiple　oil　grooves,　the　bearing　with　two　grooves　has　the　best　mechanical　behavior　and　stability　as　well　as　the　same　excellent　ability　of　dispersing　heat.　The　hydrodynamic　bearing　of　two　oil　grooves　with　the　width　diameter　equaling　to　2　and　the　eccentricity　ratio　equaling　to　0.8　is　designed　for　practical　use.　The　load　carrying　ability　of　hydrodynamic　bearing　with　two　oil　grooves　is　two　times　larger　than　that　of　the　hydrodynamic　bearing　of　four　oil　grooves.　The　attitude　angle　of　it　decreases　about　20　degrees　and　the　stable　rotate　speed　increases　from　3000　rpm　to　6000　rpm.