In　this　paper,　we　aim　at　a　paddling　type　of　microrobot　that　can　move　in　human　organs　such　as　intestines,　even　blood　vessels　as　an　assumption　has　a　great　potential　application　for　microsurgery.　Based　on　our　researches,　the　structure　of　the　paddling　microrobot　has　been　designed　in　this　paper.　By　applying　the　alternate　magnetic　field,　the　paddling　of　developed　microrobot　can　be　manipulated　with　the　frequency　of　input　current.　And　also,　the　motion　mechanism,　and　characteristic　evaluation　of　the　microrobot　have　been　discussed.　Then,　in　order　to　obtain　the　high　propulsive　force　and　good　balance,　we　improved　the　structure　of　the　paddling　microrobot　with　spiral　motion.　The　spiral　mechanisms　were　connected　to　the　front　and　end　of　the　body.　Experimental　results　indicate　the　prototype　of　the　leg　has　a　maximum　displacement　of　3.7cm,　the　spiral　motion　can　realize　moving　speed　of　58mm/s　and　the　rotating　speed　of　87rad/s,　respectively.　The　experimental　results　also　show　that　the　microrobot　has　some　advantages　such　as　the　rapid　response,　moving　stability,　operability　with　wireless.　It　will　play　an　important　role　in　both　industrial　and　medical　applications.