沈光(guang)漢(han),早年(nian)(nian)(nian)(nian)(nian)曾入粵軍(jun)(jun)第(di)(di)(di)(di)一(yi)(yi)師(shi)(shi)(shi)軍(jun)(jun)官補習(xi)訓練班受訓。民(min)(min)(min)國(guo)十(shi)(shi)(shi)(shi)(shi)(shi)(shi)四(si)年(nian)(nian)(nian)(nian)(nian)(1925)由蔡(cai)(cai)廷(ting)(ting)鍇推薦,任(ren)(ren)(ren)粵軍(jun)(jun)第(di)(di)(di)(di)一(yi)(yi)師(shi)(shi)(shi)第(di)(di)(di)(di)一(yi)(yi)旅(lv)(lv)第(di)(di)(di)(di)二(er)(er)(er)(er)團(tuan)(tuan)(團(tuan)(tuan)長(chang)(chang)(chang)(chang)(chang)蔣光(guang)鼐)第(di)(di)(di)(di)三(san)(san)營(ying)(營(ying)長(chang)(chang)(chang)(chang)(chang)黃(huang)質勝(sheng))上尉營(ying)副。民(min)(min)(min)國(guo)十(shi)(shi)(shi)(shi)(shi)(shi)(shi)六(liu)年(nian)(nian)(nian)(nian)(nian)(1927)秋(qiu)任(ren)(ren)(ren)第(di)(di)(di)(di)十(shi)(shi)(shi)(shi)(shi)(shi)(shi)師(shi)(shi)(shi)二(er)(er)(er)(er)十(shi)(shi)(shi)(shi)(shi)(shi)(shi)八(ba)團(tuan)(tuan)代理(li)團(tuan)(tuan)長(chang)(chang)(chang)(chang)(chang)。民(min)(min)(min)國(guo)十(shi)(shi)(shi)(shi)(shi)(shi)(shi)八(ba)年(nian)(nian)(nian)(nian)(nian)(1929)年(nian)(nian)(nian)(nian)(nian)三(san)(san)月(yue)(yue),任(ren)(ren)(ren)廣東編遣區獨(du)立(li)第(di)(di)(di)(di)二(er)(er)(er)(er)旅(lv)(lv)(旅(lv)(lv)長(chang)(chang)(chang)(chang)(chang)蔡(cai)(cai)廷(ting)(ting)鍇)上校(xiao)副旅(lv)(lv)長(chang)(chang)(chang)(chang)(chang)兼第(di)(di)(di)(di)一(yi)(yi)團(tuan)(tuan)團(tuan)(tuan)長(chang)(chang)(chang)(chang)(chang)(該(gai)團(tuan)(tuan)系原第(di)(di)(di)(di)十(shi)(shi)(shi)(shi)(shi)(shi)(shi)師(shi)(shi)(shi)二(er)(er)(er)(er)十(shi)(shi)(shi)(shi)(shi)(shi)(shi)八(ba)團(tuan)(tuan)改編)。是年(nian)(nian)(nian)(nian)(nian)秋(qiu),任(ren)(ren)(ren)第(di)(di)(di)(di)六(liu)十(shi)(shi)(shi)(shi)(shi)(shi)(shi)師(shi)(shi)(shi)(由獨(du)二(er)(er)(er)(er)旅(lv)(lv)擴建的)一(yi)(yi)一(yi)(yi)九旅(lv)(lv)少將(jiang)(jiang)旅(lv)(lv)長(chang)(chang)(chang)(chang)(chang)。民(min)(min)(min)國(guo)十(shi)(shi)(shi)(shi)(shi)(shi)(shi)九年(nian)(nian)(nian)(nian)(nian)(1930)升(sheng)十(shi)(shi)(shi)(shi)(shi)(shi)(shi)九路軍(jun)(jun)六(liu)十(shi)(shi)(shi)(shi)(shi)(shi)(shi)師(shi)(shi)(shi)副師(shi)(shi)(shi)長(chang)(chang)(chang)(chang)(chang)(師(shi)(shi)(shi)長(chang)(chang)(chang)(chang)(chang)蔡(cai)(cai)廷(ting)(ting)鍇)。民(min)(min)(min)國(guo)二(er)(er)(er)(er)十(shi)(shi)(shi)(shi)(shi)(shi)(shi)年(nian)(nian)(nian)(nian)(nian)(1931)獲四(si)等寶鼎勛章(zhang)。是年(nian)(nian)(nian)(nian)(nian)六(liu)月(yue)(yue)升(sheng)第(di)(di)(di)(di)六(liu)十(shi)(shi)(shi)(shi)(shi)(shi)(shi)師(shi)(shi)(shi)中將(jiang)(jiang)師(shi)(shi)(shi)長(chang)(chang)(chang)(chang)(chang)。民(min)(min)(min)國(guo)二(er)(er)(er)(er)十(shi)(shi)(shi)(shi)(shi)(shi)(shi)一(yi)(yi)年(nian)(nian)(nian)(nian)(nian)(1932)十(shi)(shi)(shi)(shi)(shi)(shi)(shi)月(yue)(yue),因(yin)“一(yi)(yi)·二(er)(er)(er)(er)八(ba)”淞(song)滬抗日有功,獲青天白日勛章(zhang)。民(min)(min)(min)國(guo)二(er)(er)(er)(er)十(shi)(shi)(shi)(shi)(shi)(shi)(shi)二(er)(er)(er)(er)年(nian)(nian)(nian)(nian)(nian)(1933)十(shi)(shi)(shi)(shi)(shi)(shi)(shi)一(yi)(yi)月(yue)(yue)“閩(min)變”爆(bao)發,任(ren)(ren)(ren)福(fu)建人民(min)(min)(min)革(ge)命軍(jun)(jun)第(di)(di)(di)(di)一(yi)(yi)方面軍(jun)(jun)第(di)(di)(di)(di)一(yi)(yi)軍(jun)(jun)軍(jun)(jun)長(chang)(chang)(chang)(chang)(chang)(總(zong)司令蔡(cai)(cai)廷(ting)(ting)鍇)。閩(min)變失敗后(hou)回(hui)住香(xiang)港(gang)(gang)。民(min)(min)(min)國(guo)二(er)(er)(er)(er)十(shi)(shi)(shi)(shi)(shi)(shi)(shi)六(liu)年(nian)(nian)(nian)(nian)(nian)(1937)抗戰軍(jun)(jun)興,出任(ren)(ren)(ren)軍(jun)(jun)事參議員(yuan)中將(jiang)(jiang)參議,很少在軍(jun)(jun)界活動。三(san)(san)十(shi)(shi)(shi)(shi)(shi)(shi)(shi)五年(nian)(nian)(nian)(nian)(nian)(1946)以(yi)后(hou)被(bei)選為第(di)(di)(di)(di)一(yi)(yi)屆國(guo)民(min)(min)(min)大(da)會代表,也曾任(ren)(ren)(ren)私立(li)德(de)業小學校(xiao)長(chang)(chang)(chang)(chang)(chang)。1972年(nian)(nian)(nian)(nian)(nian)11月(yue)(yue)29日病逝于香(xiang)港(gang)(gang),終年(nian)(nian)(nian)(nian)(nian)八(ba)十(shi)(shi)(shi)(shi)(shi)(shi)(shi)五歲。
1930年,沈光漢將軍(jun)任十(shi)九路軍(jun)六十(shi)師(shi)(shi)副師(shi)(shi)長(chang)(師(shi)(shi)長(chang)蔡廷(ting)鍇)。
1931年(nian),沈(shen)光漢率(lv)(lv)所部第六十師(shi)駐防蘇州(zhou)(zhou)、常州(zhou)(zhou)一(yi)帶。1931年(nian)1月(yue)28日(ri)(ri)(ri)(ri),日(ri)(ri)(ri)(ri)軍進攻上海(hai)(hai),蔡廷鍇即令沈(shen)率(lv)(lv)部開赴上海(hai)(hai)抗(kang)(kang)戰(zhan)。1月(yue)30日(ri)(ri)(ri)(ri),沈(shen)部到達(da)上海(hai)(hai)南(nan)翔、真茹等地(di)待命。2月(yue)1日(ri)(ri)(ri)(ri),接(jie)替駐在閘北、虹口及八字(zi)橋等處七(qi)十八師(shi)的(de)(de)防務。原七(qi)十八師(shi)翁照垣旅劃歸沈(shen)光漢指揮(hui)(hui),沈(shen)師(shi)遂成為(wei)抗(kang)(kang)戰(zhan)主(zhu)力。七(qi)十八、六十一(yi)師(shi)為(wei)總預備隊(dui)。2月(yue)3日(ri)(ri)(ri)(ri)始,日(ri)(ri)(ri)(ri)軍相(xiang)繼向吳淞(song)、閘北及江灣進犯,沈(shen)光漢率(lv)(lv)所部及配(pei)屬部隊(dui)與之浴血戰(zhan)斗30多天,雖敵(di)軍數倍于己,但(dan)沈(shen)師(shi)陣地(di)始終屹立不(bu)動。尤其八字(zi)橋陣地(di),地(di)處要沖(chong),敵(di)軍在飛機、大(da)(da)炮、坦克的(de)(de)配(pei)合下,輪番(fan)攻擊,沈(shen)率(lv)(lv)部堅(jian)決(jue)抵抗(kang)(kang),僅2月(yue)7日(ri)(ri)(ri)(ri)一(yi)天,就殲(jian)日(ri)(ri)(ri)(ri)軍千余人,擊燒(shao)日(ri)(ri)(ri)(ri)軍前敵(di)指揮(hui)(hui)雨田大(da)(da)佐。