關于(yu)(yu)由(you)“紅(hong)軍”的(de)(de)(de)(de)稱(cheng)(cheng)(cheng)號(hao)改變為(wei)“工農紅(hong)軍”的(de)(de)(de)(de)稱(cheng)(cheng)(cheng)號(hao)，在(zai)中(zhong)共中(zhong)央的(de)(de)(de)(de)歷史文獻(xian)中(zhong)沒有(you)(you)見(jian)到明確的(de)(de)(de)(de)指示。至于(yu)(yu)這個稱(cheng)(cheng)(cheng)號(hao)的(de)(de)(de)(de)最(zui)早使(shi)(shi)用，只見(jian)于(yu)(yu)廣州(zhou)起義，但中(zhong)共中(zhong)央并(bing)未贊同。后來(lai)幾年也未見(jian)有(you)(you)這一稱(cheng)(cheng)(cheng)號(hao)的(de)(de)(de)(de)使(shi)(shi)用。

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最早(zao)使用(yong)這一稱(cheng)(cheng)號的(de)(de)中共(gong)中央(yang)文(wen)件，是1931年1月(yue)7日(ri)(ri)《中國(guo)(guo)(guo)(guo)(guo)共(gong)產黨中央(yang)四中擴大(da)會告中國(guo)(guo)(guo)(guo)(guo)工農(nong)(nong)(nong)紅(hong)軍(jun)書》。此后，在(zai)中共(gong)中央(yang)和(he)地方黨的(de)(de)文(wen)件中稱(cheng)(cheng)我軍(jun)為“工農(nong)(nong)(nong)紅(hong)軍(jun)”的(de)(de)逐漸(jian)多起(qi)來(lai)了。例如3月(yue)9日(ri)(ri)中央(yang)在(zai)《紅(hong)旗周報》公布的(de)(de)《蘇(su)維埃第一次全國(guo)(guo)(guo)(guo)(guo)代表(biao)大(da)會關于(yu)紅(hong)軍(jun)問題決(jue)議草案》中，明(ming)確(que)提到“在(zai)中國(guo)(guo)(guo)(guo)(guo)共(gong)產黨的(de)(de)領(ling)導下，已經創(chuang)造了中國(guo)(guo)(guo)(guo)(guo)的(de)(de)工農(nong)(nong)(nong)紅(hong)軍(jun)”，9月(yue)20日(ri)(ri)以“中國(guo)(guo)(guo)(guo)(guo)工農(nong)(nong)(nong)紅(hong)軍(jun)”的(de)(de)名(ming)義發(fa)出《為日(ri)(ri)本帝國(guo)(guo)(guo)(guo)(guo)主義強占了滿洲告白軍(jun)士兵兄弟書》。特(te)別(bie)在(zai)11月(yue)7日(ri)(ri)瑞金成(cheng)立中華(hua)蘇(su)維埃共(gong)和(he)國(guo)(guo)(guo)(guo)(guo)后“工農(nong)(nong)(nong)紅(hong)軍(jun)”名(ming)稱(cheng)(cheng)更以法律形式肯定下來(lai)，而“紅(hong)軍(jun)”稱(cheng)(cheng)號則變成(cheng)“工農(nong)(nong)(nong)紅(hong)軍(jun)”的(de)(de)“簡稱(cheng)(cheng)”了。

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1930年10月《共(gong)(gong)(gong)產(chan)國(guo)(guo)際執委給中(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)共(gong)(gong)(gong)中(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)央關于(yu)立三(san)路線問題的(de)(de)(de)(de)信》中(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)，說(shuo)中(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)國(guo)(guo)“還(huan)沒有那具(ju)有工(gong)(gong)人的(de)(de)(de)(de)指(zhi)揮(hui)干部(bu)和強(qiang)固的(de)(de)(de)(de)共(gong)(gong)(gong)產(chan)黨(dang)(dang)骨干的(de)(de)(de)(de)真(zhen)正工(gong)(gong)農(nong)(nong)紅(hong)軍(jun)(jun)”。現在(zai)，紅(hong)軍(jun)(jun)的(de)(de)(de)(de)成(cheng)績很大，“可是，這個紅(hong)軍(jun)(jun)還(huan)薄弱(ruo)，還(huan)組織得(de)不(bu)夠，還(huan)沒有完全握在(zai)中(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)國(guo)(guo)共(gong)(gong)(gong)產(chan)黨(dang)(dang)手里。紅(hong)軍(jun)(jun)的(de)(de)(de)(de)社會成(cheng)分(fen)(fen)(fen)還(huan)很不(bu)能令人滿(man)意。在(zai)許(xu)多(duo)紅(hong)軍(jun)(jun)隊伍的(de)(de)(de)(de)兵(bing)士成(cheng)分(fen)(fen)(fen)里，以(yi)前的(de)(de)(de)(de)軍(jun)(jun)閥軍(jun)(jun)隊兵(bing)士還(huan)占多(duo)數，富農(nong)(nong)往往鉆到紅(hong)軍(jun)(jun)里面來(lai)，必須把(ba)(ba)紅(hong)軍(jun)(jun)變(bian)成(cheng)具(ju)有無產(chan)階(jie)級領導的(de)(de)(de)(de)工(gong)(gong)農(nong)(nong)軍(jun)(jun)隊”。在(zai)提到中(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)國(guo)(guo)黨(dang)(dang)的(de)(de)(de)(de)任務時，首先提出(chu)“立刻團(tuan)結真(zhen)正的(de)(de)(de)(de)工(gong)(gong)農(nong)(nong)紅(hong)軍(jun)(jun)”。11月，中(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)共(gong)(gong)(gong)中(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)央政(zheng)治局根據共(gong)(gong)(gong)產(chan)國(guo)(guo)際指(zhi)示制定的(de)(de)(de)(de)《關于(yu)蘇維埃區與目前工(gong)(gong)作(zuo)計劃》中(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)出(chu)現了“工(gong)(gong)農(nong)(nong)紅(hong)軍(jun)(jun)”的(de)(de)(de)(de)稱(cheng)號(hao)。以(yi)后在(zai)共(gong)(gong)(gong)產(chan)國(guo)(guo)際和中(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)共(gong)(gong)(gong)中(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)央文件中(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)，只(zhi)要涉及(ji)紅(hong)軍(jun)(jun)問題，總是特別強(qiang)調在(zai)成(cheng)分(fen)(fen)(fen)上改(gai)造，把(ba)(ba)紅(hong)軍(jun)(jun)變(bian)“成(cheng)為(wei)工(gong)(gong)人和農(nong)(nong)民的(de)(de)(de)(de)隊伍”，“真(zhen)正的(de)(de)(de)(de)工(gong)(gong)農(nong)(nong)紅(hong)軍(jun)(jun)”。所以(yi)，1931年起中(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)共(gong)(gong)(gong)中(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)央把(ba)(ba)“紅(hong)軍(jun)(jun)”稱(cheng)號(hao)改(gai)稱(cheng)為(wei)“工(gong)(gong)農(nong)(nong)紅(hong)軍(jun)(jun)”的(de)(de)(de)(de)稱(cheng)號(hao)，其(qi)緣(yuan)由(you)就在(zai)于(yu)此。