浙(zhe)東(dong)革命根據地(di)紀念(nian)館位(wei)于(yu)余姚市梁弄鎮橫坎(kan)頭村,借址(zhi)(zhi)于(yu)省級(ji)文物保護單位(wei)中(zhong)共(gong)浙(zhe)東(dong)區委(wei)舊(jiu)(jiu)址(zhi)(zhi)內。中(zhong)共(gong)浙(zhe)東(dong)區委(wei)舊(jiu)(jiu)址(zhi)(zhi)為木結構(gou)二層清末民居(ju),由主樓及翼樓等建筑組合(he)而成。大(da)整(zheng)幢建筑掩映于(yu)紅(hong)崗勁(jing)松之中(zhong),莊嚴肅穆,是廣大(da)人民群眾特別(bie)是青少(shao)年接(jie)受愛國主義(yi)革命傳統教育的重要場(chang)所。
1942年(nian)7月(yue),為(wei)加強對浙(zhe)東(dong)(dong)(dong)抗(kang)(kang)日(ri)(ri)(ri)(ri)斗爭的(de)(de)領導,中(zhong)(zhong)共(gong)浙(zhe)東(dong)(dong)(dong)區委員會在(zai)慈北(bei)(bei)(bei)成(cheng)立。之(zhi)后(hou),中(zhong)(zhong)共(gong)浙(zhe)東(dong)(dong)(dong)區委根(gen)據浙(zhe)東(dong)(dong)(dong)抗(kang)(kang)戰的(de)(de)新(xin)形勢,確定了(le)(le)“堅持三北(bei)(bei)(bei),開辟四(si)明”的(de)(de)戰略方(fang)針,于1942年(nian)10月(yue)進軍(jun)(jun)四(si)明山區。1943年(nian)4月(yue),姚南(nan)重鎮(zhen)梁(liang)弄(nong)獲得(de)解放后(hou)不久,中(zhong)(zhong)共(gong)浙(zhe)東(dong)(dong)(dong)區委及三北(bei)(bei)(bei)游(you)擊(ji)司令部(后(hou)改名(ming)新(xin)四(si)軍(jun)(jun)浙(zhe)東(dong)(dong)(dong)游(you)擊(ji)縱隊司令部)等黨(dang)政(zheng)軍(jun)(jun)機關便(bian)進駐(zhu)梁(liang)弄(nong),區黨(dang)委設在(zai)橫坎頭(tou)村(cun),司令部設在(zai)梁(liang)弄(nong)曉嶺街“小源(yuan)和(he)”內(nei),從此,梁(liang)弄(nong)成(cheng)為(wei)浙(zhe)東(dong)(dong)(dong)抗(kang)(kang)日(ri)(ri)(ri)(ri)根(gen)據地的(de)(de)政(zheng)治、經濟、軍(jun)(jun)事和(he)文化中(zhong)(zhong)心,浙(zhe)東(dong)(dong)(dong)抗(kang)(kang)日(ri)(ri)(ri)(ri)根(gen)據地成(cheng)為(wei)抗(kang)(kang)戰時(shi)期全(quan)國(guo)(guo)十九個抗(kang)(kang)日(ri)(ri)(ri)(ri)根(gen)據地之(zhi)一(yi)。中(zhong)(zhong)國(guo)(guo)共(gong)產(chan)黨(dang)在(zai)梁(liang)弄(nong)領導浙(zhe)東(dong)(dong)(dong)軍(jun)(jun)民,團結奮斗,浴(yu)血奮戰,譜寫了(le)(le)無(wu)數曲(qu)勝利的(de)(de)凱歌。抗(kang)(kang)戰勝利后(hou),為(wei)實現全(quan)國(guo)(guo)和(he)平,新(xin)四(si)軍(jun)(jun)浙(zhe)東(dong)(dong)(dong)游(you)擊(ji)縱隊主力奉命(ming)北(bei)(bei)(bei)撤,留下極少數同志堅持浙(zhe)東(dong)(dong)(dong)地區的(de)(de)斗爭,粉碎了(le)(le)國(guo)(guo)民黨(dang)反(fan)動派(pai)的(de)(de)多次(ci)“清剿”,1949年(nian)5月(yue)配合南(nan)下大軍(jun)(jun)解放了(le)(le)余姚。
為(wei)記錄和(he)紀(ji)(ji)念(nian)(nian)浙東(dong)(dong)抗日軍民的歷(li)史功績,開展(zhan)愛國(guo)主義和(he)革(ge)命傳統教育,全國(guo)解放后(hou),余姚地(di)(di)(di)方政(zheng)府就(jiu)著手建立革(ge)命紀(ji)(ji)念(nian)(nian)館(guan)(guan)。1978年(nian)(nian)11月,四明(ming)山(shan)革(ge)命紀(ji)(ji)念(nian)(nian)館(guan)(guan)由正蒙小學(xue)遷址到(dao)中共浙東(dong)(dong)區委舊址內,并于1981年(nian)(nian)7月1日正式(shi)對外開放。1992年(nian)(nian),為(wei)紀(ji)(ji)念(nian)(nian)中共浙東(dong)(dong)區委成立暨(ji)浙東(dong)(dong)抗日根(gen)據(ju)地(di)(di)(di)創建五(wu)十周(zhou)年(nian)(nian),對紀(ji)(ji)念(nian)(nian)館(guan)(guan)進(jin)行(xing)整(zheng)修(xiu)和(he)重新(xin)(xin)陳列(lie)布展(zhan),同時,四明(ming)山(shan)革(ge)命紀(ji)(ji)念(nian)(nian)館(guan)(guan)更(geng)名為(wei)浙東(dong)(dong)革(ge)命根(gen)據(ju)地(di)(di)(di)紀(ji)(ji)念(nian)(nian)館(guan)(guan)。1996年(nian)(nian)至(zhi)2000年(nian)(nian),紀(ji)(ji)念(nian)(nian)館(guan)(guan)進(jin)行(xing)了擴建和(he)陳列(lie)更(geng)新(xin)(xin),增(zeng)加了觀(guan)眾(zhong)休息和(he)活(huo)動的場所等新(xin)(xin)的功能區,更(geng)新(xin)(xin)了“浙東(dong)(dong)革(ge)命根(gen)據(ju)地(di)(di)(di)史料陳列(lie)”,為(wei)浙東(dong)(dong)革(ge)命根(gen)據(ju)地(di)(di)(di)紀(ji)(ji)念(nian)(nian)館(guan)(guan)整(zheng)體功能的發(fa)揮奠(dian)定(ding)了良好(hao)的基(ji)礎。