韓(han)(han)子(zi)(zi)(zi)(zi)高(gao)(gao)(gao)家世(shi)原(yuan)本寒(han)微(wei),侯(hou)景之亂時(shi),韓(han)(han)子(zi)(zi)(zi)(zi)高(gao)(gao)(gao)寄居在京師建康(kang)(今江(jiang)蘇南京)。侯(hou)景之亂平(ping)定(ding)后(hou),時(shi)任吳興(xing)太守(shou)的陳(chen)(chen)(chen)(chen)文帝陳(chen)(chen)(chen)(chen)蒨(qian)(qian)出守(shou)吳興(xing),韓(han)(han)子(zi)(zi)(zi)(zi)高(gao)(gao)(gao)時(shi)年(nian)十六(liu)歲,值總角(jiao)之年(nian)。韓(han)(han)子(zi)(zi)(zi)(zi)高(gao)(gao)(gao)容貌美麗(li),看(kan)上去像個美女一(yi)般。在淮渚想要(yao)搭(da)部(bu)伍之車(che)乘坐還鄉,陳(chen)(chen)(chen)(chen)蒨(qian)(qian)愛之,問他(ta)愿(yuan)不愿(yuan)意侍奉自己,韓(han)(han)子(zi)(zi)(zi)(zi)高(gao)(gao)(gao)應(ying)允。韓(han)(han)子(zi)(zi)(zi)(zi)高(gao)(gao)(gao)原(yuan)名韓(han)(han)蠻子(zi)(zi)(zi)(zi),陳(chen)(chen)(chen)(chen)蒨(qian)(qian)為(wei)他(ta)改(gai)名韓(han)(han)子(zi)(zi)(zi)(zi)高(gao)(gao)(gao)。生性(xing)恭敬謹慎,盡心(xin)盡力地侍奉,常常帶(dai)著(zhu)刀為(wei)陳(chen)(chen)(chen)(chen)蒨(qian)(qian)防(fang)身(shen),也常為(wei)陳(chen)(chen)(chen)(chen)蒨(qian)(qian)端盤子(zi)(zi)(zi)(zi)送(song)酒食。陳(chen)(chen)(chen)(chen)蒨(qian)(qian)性(xing)子(zi)(zi)(zi)(zi)急,韓(han)(han)子(zi)(zi)(zi)(zi)高(gao)(gao)(gao)總能領悟(wu)其意。年(nian)長后(hou),學會了一(yi)些騎射之術,處事勇(yong)敢果決(jue),希(xi)望做個將帥之人。平(ping)定(ding)杜(du)龕叛亂后(hou),陳(chen)(chen)(chen)(chen)蒨(qian)(qian)配給(gei)他(ta)士卒。陳(chen)(chen)(chen)(chen)蒨(qian)(qian)十分寵幸他(ta),不曾(ceng)讓他(ta)離開(kai)身(shen)邊。陳(chen)(chen)(chen)(chen)蒨(qian)(qian)曾(ceng)經做夢(meng)夢(meng)見自己騎馬(ma)登(deng)山,道(dao)路險惡,幾乎(hu)要(yao)墜下(xia)山去,得(de)韓(han)(han)子(zi)(zi)(zi)(zi)高(gao)(gao)(gao)之推扶而得(de)以(yi)繼(ji)續攀登(deng)。
陳蒨(qian)討伐張彪(biao)(biao)時,沈泰等為(wei)先(xian)降,陳蒨(qian)占據州城,周文育(yu)鎮守北郭香(xiang)巖寺,張彪(biao)(biao)自剡縣(xian)乘夜回軍(jun)偷襲城池,陳蒨(qian)從(cong)北門逃(tao)(tao)出,事起倉卒,又值黃昏(hun)(hun)昏(hun)(hun)暗(an),軍(jun)人紛紛混亂,周文育(yu)也(ye)不知陳蒨(qian)在哪里,只有韓(han)(han)(han)子高(gao)在陳蒨(qian)身邊,陳蒨(qian)便派韓(han)(han)(han)子高(gao)從(cong)亂軍(jun)中(zhong)前往見(jian)周文育(yu),復命酬答,在昏(hun)(hun)暗(an)中(zhong)又趕去慰勞(lao)眾軍(jun)。陳蒨(qian)稍(shao)稍(shao)攏合一些游散之(zhi)兵(bing),又由韓(han)(han)(han)子高(gao)引導進入周文育(yu)的(de)(de)(de)軍(jun)營中(zhong),因此一道建立了寨柵。次日,與(yu)張彪(biao)(biao)作(zuo)戰,張彪(biao)(biao)的(de)(de)(de)部將申縉(jin)又來投降,張彪(biao)(biao)便逃(tao)(tao)奔松(song)山(shan),浙東地區平定(ding)。陳蒨(qian)于是(shi)將手下(xia)的(de)(de)(de)兵(bing)馬多(duo)配給韓(han)(han)(han)子高(gao),韓(han)(han)(han)子高(gao)也(ye)輕擲錢財禮賢下(xia)士,歸附他的(de)(de)(de)人很多(duo)。
永定(ding)三(san)年(nian)(559年(nian)),陳蒨即皇帝(di)位(wei),是(shi)為(wei)(wei)陳文(wen)帝(di),任命韓子高(gao)為(wei)(wei)右軍將軍。天嘉元年(nian)(560),封為(wei)(wei)文(wen)招縣子,食邑三(san)百戶。王(wang)琳到柵口時(shi),韓子高(gao)在臺內(nei)值宿(su)。等到平定(ding)王(wang)琳叛(pan)亂后,韓子高(gao)所(suo)統之兵更多(duo)了(le),將士依附于他的,韓子高(gao)都盡力(li)加以提拔,陳文(wen)帝(di)也都加以任用。
天嘉二年(561),升(sheng)任員外(wai)(wai)散騎常侍、壯武將軍(jun)、成州刺史。等到征(zheng)討留(liu)異(yi)時(shi),韓(han)子高跟隨侯安(an)都(dou)屯兵在桃支嶺(ling)巖(yan)下。當(dang)時(shi)韓(han)子高兵強馬(ma)(ma)壯,裝備精良,另外(wai)(wai)統率一營(ying)人馬(ma)(ma),單(dan)馬(ma)(ma)沖(chong)入敵陣(zhen),傷了左(zuo)頸,頭(tou)上發髻(ji)也被削掉一半。平定(ding)留(liu)異(yi)后,擔任假(jia)節、貞毅(yi)將軍(jun)、東陽太守。 ?
天(tian)(tian)嘉五年(nian)(nian)(564年(nian)(nian)),章昭達等(deng)人從(cong)臨川征(zheng)討晉安(an),韓子(zi)高(gao)(gao)從(cong)安(an)泉嶺出發與他在建安(an)會(hui)師,在諸將中人馬(ma)號稱最為(wei)強(qiang)盛(sheng)。晉安(an)平定,以功升任通直散騎(qi)常(chang)侍(shi),晉爵為(wei)伯(bo)(bo),增加食邑連(lian)同舊(jiu)邑共四百戶。天(tian)(tian)嘉六年(nian)(nian)(565年(nian)(nian)),征(zheng)召(zhao)回朝(chao)擔任右衛將軍,到京師建康(今江蘇南京),鎮守領軍府。陳(chen)(chen)文帝病重,韓子(zi)高(gao)(gao)入內侍(shi)奉醫藥。天(tian)(tian)康元年(nian)(nian)(566年(nian)(nian)),陳(chen)(chen)文帝去世,其(qi)子(zi)陳(chen)(chen)廢(fei)帝陳(chen)(chen)伯(bo)(bo)宗即位(wei),升任韓子(zi)高(gao)(gao)為(wei)散騎(qi)常(chang)侍(shi),仍為(wei)右衛將軍,移營駐兵(bing)于新(xin)安(an)寺。
陳伯宗即位(wei)后,由其(qi)叔(shu)父陳頊(xu)輔政。韓(han)子(zi)高因兵權過重(zhong),心中很是不安,喜歡(huan)訪查臺(tai)閣,便請求出京(jing)擔任衡、廣諸州鎮守使。光大元年(nian)(567年(nian))八月,前任上虞縣令(ling)陸昉和(he)韓(han)子(zi)高的軍帥舉報他(ta)謀(mou)反。當(dang)時(shi)陳頊(xu)在(zai)尚書省(sheng)召集文武百官在(zai)位(wei)者(zhe)議立皇太子(zi),韓(han)子(zi)高也來(lai)參加,清晨韓(han)子(zi)高一(yi)(yi)踏進尚書省(sheng),便被(bei)捉住,送(song)交廷尉(wei),當(dang)晚與到仲舉一(yi)(yi)同(tong)賜(si)死(si),時(shi)年(nian)三十(shi)歲。其(qi)父韓(han)延慶及子(zi)侄輩一(yi)(yi)并赦(she)免(mian)。