沈(shen)光漢,早年(nian)(nian)(nian)(nian)(nian)(nian)曾入粵軍(jun)(jun)第(di)(di)(di)一(yi)(yi)師(shi)(shi)(shi)軍(jun)(jun)官補習訓(xun)練班受訓(xun)。民(min)(min)(min)國(guo)十(shi)(shi)(shi)四年(nian)(nian)(nian)(nian)(nian)(nian)(1925)由(you)蔡廷(ting)鍇(kai)(kai)推薦,任(ren)(ren)粵軍(jun)(jun)第(di)(di)(di)一(yi)(yi)師(shi)(shi)(shi)第(di)(di)(di)一(yi)(yi)旅(lv)(lv)第(di)(di)(di)二(er)(er)(er)團(tuan)(團(tuan)長(chang)蔣光鼐)第(di)(di)(di)三營(ying)(營(ying)長(chang)黃質勝(sheng))上尉營(ying)副(fu)。民(min)(min)(min)國(guo)十(shi)(shi)(shi)六(liu)年(nian)(nian)(nian)(nian)(nian)(nian)(1927)秋任(ren)(ren)第(di)(di)(di)十(shi)(shi)(shi)師(shi)(shi)(shi)二(er)(er)(er)十(shi)(shi)(shi)八(ba)(ba)(ba)團(tuan)代(dai)理團(tuan)長(chang)。民(min)(min)(min)國(guo)十(shi)(shi)(shi)八(ba)(ba)(ba)年(nian)(nian)(nian)(nian)(nian)(nian)(1929)年(nian)(nian)(nian)(nian)(nian)(nian)三月(yue),任(ren)(ren)廣東編遣區獨(du)立第(di)(di)(di)二(er)(er)(er)旅(lv)(lv)(旅(lv)(lv)長(chang)蔡廷(ting)鍇(kai)(kai))上校(xiao)副(fu)旅(lv)(lv)長(chang)兼第(di)(di)(di)一(yi)(yi)團(tuan)團(tuan)長(chang)(該(gai)團(tuan)系(xi)原第(di)(di)(di)十(shi)(shi)(shi)師(shi)(shi)(shi)二(er)(er)(er)十(shi)(shi)(shi)八(ba)(ba)(ba)團(tuan)改編)。是(shi)年(nian)(nian)(nian)(nian)(nian)(nian)秋,任(ren)(ren)第(di)(di)(di)六(liu)十(shi)(shi)(shi)師(shi)(shi)(shi)(由(you)獨(du)二(er)(er)(er)旅(lv)(lv)擴建的(de))一(yi)(yi)一(yi)(yi)九旅(lv)(lv)少將旅(lv)(lv)長(chang)。民(min)(min)(min)國(guo)十(shi)(shi)(shi)九年(nian)(nian)(nian)(nian)(nian)(nian)(1930)升十(shi)(shi)(shi)九路軍(jun)(jun)六(liu)十(shi)(shi)(shi)師(shi)(shi)(shi)副(fu)師(shi)(shi)(shi)長(chang)(師(shi)(shi)(shi)長(chang)蔡廷(ting)鍇(kai)(kai))。民(min)(min)(min)國(guo)二(er)(er)(er)十(shi)(shi)(shi)年(nian)(nian)(nian)(nian)(nian)(nian)(1931)獲(huo)四等寶鼎勛(xun)章。是(shi)年(nian)(nian)(nian)(nian)(nian)(nian)六(liu)月(yue)升第(di)(di)(di)六(liu)十(shi)(shi)(shi)師(shi)(shi)(shi)中將師(shi)(shi)(shi)長(chang)。民(min)(min)(min)國(guo)二(er)(er)(er)十(shi)(shi)(shi)一(yi)(yi)年(nian)(nian)(nian)(nian)(nian)(nian)(1932)十(shi)(shi)(shi)月(yue),因“一(yi)(yi)·二(er)(er)(er)八(ba)(ba)(ba)”淞滬抗日有(you)功,獲(huo)青天(tian)白日勛(xun)章。民(min)(min)(min)國(guo)二(er)(er)(er)十(shi)(shi)(shi)二(er)(er)(er)年(nian)(nian)(nian)(nian)(nian)(nian)(1933)十(shi)(shi)(shi)一(yi)(yi)月(yue)“閩(min)變(bian)”爆發(fa),任(ren)(ren)福建人民(min)(min)(min)革命(ming)軍(jun)(jun)第(di)(di)(di)一(yi)(yi)方面軍(jun)(jun)第(di)(di)(di)一(yi)(yi)軍(jun)(jun)軍(jun)(jun)長(chang)(總(zong)司令(ling)蔡廷(ting)鍇(kai)(kai))。閩(min)變(bian)失敗后回住(zhu)香(xiang)港。民(min)(min)(min)國(guo)二(er)(er)(er)十(shi)(shi)(shi)六(liu)年(nian)(nian)(nian)(nian)(nian)(nian)(1937)抗戰軍(jun)(jun)興,出任(ren)(ren)軍(jun)(jun)事參議員中將參議,很(hen)少在軍(jun)(jun)界活動。三十(shi)(shi)(shi)五年(nian)(nian)(nian)(nian)(nian)(nian)(1946)以(yi)后被選為第(di)(di)(di)一(yi)(yi)屆(jie)國(guo)民(min)(min)(min)大會代(dai)表,也曾任(ren)(ren)私立德業小學(xue)校(xiao)長(chang)。1972年(nian)(nian)(nian)(nian)(nian)(nian)11月(yue)29日病逝于香(xiang)港,終年(nian)(nian)(nian)(nian)(nian)(nian)八(ba)(ba)(ba)十(shi)(shi)(shi)五歲。
1930年(nian),沈光漢(han)將軍任十九(jiu)路軍六十師(shi)副師(shi)長(chang)(師(shi)長(chang)蔡廷鍇(kai))。
1931年,沈(shen)光漢率所部(bu)(bu)第六十(shi)師駐防(fang)蘇州、常州一帶。1931年1月(yue)28日(ri),日(ri)軍(jun)(jun)進(jin)攻上海(hai),蔡廷鍇(kai)即令沈(shen)率部(bu)(bu)開赴上海(hai)抗戰。1月(yue)30日(ri),沈(shen)部(bu)(bu)到達上海(hai)南(nan)翔、真(zhen)茹等地待命。2月(yue)1日(ri),接替駐在閘北(bei)、虹口及八(ba)字橋等處(chu)七十(shi)八(ba)師的防(fang)務。原七十(shi)八(ba)師翁照垣旅劃歸(gui)沈(shen)光漢指揮(hui),沈(shen)師遂(sui)成(cheng)為抗戰主力(li)。七十(shi)八(ba)、六十(shi)一師為總預(yu)備隊。2月(yue)3日(ri)始,日(ri)軍(jun)(jun)相繼向吳(wu)淞、閘北(bei)及江(jiang)灣進(jin)犯,沈(shen)光漢率所部(bu)(bu)及配(pei)屬(shu)部(bu)(bu)隊與之浴血戰斗30多天,雖敵軍(jun)(jun)數倍于己(ji),但沈(shen)師陣(zhen)(zhen)地始終(zhong)屹立(li)不(bu)動。尤其八(ba)字橋陣(zhen)(zhen)地,地處(chu)要(yao)沖,敵軍(jun)(jun)在飛機、大(da)炮、坦克的配(pei)合下,輪番攻擊(ji),沈(shen)率部(bu)(bu)堅決(jue)抵抗,僅2月(yue)7日(ri)一天,就殲日(ri)軍(jun)(jun)千余人,擊(ji)燒日(ri)軍(jun)(jun)前敵指揮(hui)雨田大(da)佐(zuo)。