遺(yi)址發(fa)現(xian)文物(wu)近千(qian)件(jian)(jian),其中(zhong)陶(tao)(tao)器(qi)475件(jian)(jian),石(shi)(shi)器(qi)169件(jian)(jian),骨(gu)器(qi)六七十件(jian)(jian),銅(tong)(tong)器(qi)14件(jian)(jian)。陶(tao)(tao)器(qi)有(you)夾沙和硬陶(tao)(tao)兩種,前者(zhe)皆手制,后(hou)者(zhe)輪(lun)制,且有(you)花紋。陶(tao)(tao)器(qi)很少完(wan)整,其中(zhong)以網墜為多。石(shi)(shi)器(qi)有(you)斧(fu)、錛、鑿、刀、鏃、錐(zhui)(zhui)、環、紡(fang)(fang)輪(lun)、磨(mo)石(shi)(shi)等。石(shi)(shi)刀全(quan)部穿孔(kong)(kong),有(you)單孔(kong)(kong)、雙孔(kong)(kong),也有(you)磨(mo)槽后(hou)穿孔(kong)(kong)的。骨(gu)角(jiao)器(qi)有(you)針、錐(zhui)(zhui)、紡(fang)(fang)輪(lun)、磨(mo)石(shi)(shi)等。石(shi)(shi)刀全(quan)部穿孔(kong)(kong),有(you)單孔(kong)(kong)、雙孔(kong)(kong),也有(you)磨(mo)槽后(hou)穿孔(kong)(kong)的。骨(gu)角(jiao)器(qi)有(you)針、錐(zhui)(zhui)、紡(fang)(fang)輪(lun)、穿孔(kong)(kong)獸牙、穿孔(kong)(kong)骨(gu)片(pian)等。銅(tong)(tong)器(qi)有(you)斧(fu)、鋮、刀、鑿、環、魚鉤和裝飾(shi)品(pin),還發(fa)現(xian)半塊陶(tao)(tao)范,范上花紋與一把銅(tong)(tong)斧(fu)花紋相吻(wen)合。此(ci)外,遺(yi)址中(zhong)有(you)四處(chu)發(fa)現(xian)谷(gu)(gu)物(wu),出土(tu)(tu)時均成黑(hei)色(se)。經有(you)關部門鑒定,出土(tu)(tu)谷(gu)(gu)物(wu)屬于粳(jing)稻類(lei)型(xing)。還有(you)大(da)量獸骨(gu)出土(tu)(tu)。
經中國科學院考古研究(jiu)所實驗室放射性碳素(su)測定,海門(men)口出土(tu)圓木樁,距今已3115±90年(nian)(公(gong)元(yuan)前1150±90年(nian))。經過(guo)樹輪較正后的數據為(wei)公(gong)元(yuan)前1335±155年(nian)。
海門口遺址(zhi)出土文(wen)(wen)物,屬(shu)銅石(shi)(shi)(shi)并用時(shi)(shi)期文(wen)(wen)化,這(zhe)一(yi)遺址(zhi)的(de)發(fa)(fa)現(xian),反(fan)映出云(yun)南原始(shi)(shi)社會(hui)末期之社會(hui)面貌,說明當時(shi)(shi)這(zhe)里已形成(cheng)(cheng)一(yi)個濱水的(de)村落(luo),村落(luo)房(fang)屋為一(yi)種(zhong)干欄建筑,與(yu)近(jin)代云(yun)南一(yi)些少(shao)數(shu)民族房(fang)屋相似。遺址(zhi)發(fa)(fa)現(xian)的(de)器(qi)物,具有洱海地(di)區新石(shi)(shi)(shi)器(qi)文(wen)(wen)化若干特征,無論石(shi)(shi)(shi)器(qi)或(huo)骨器(qi),都磨得整齊精致,陶器(qi)開(kai)始(shi)(shi)出現(xian)輪制(zhi)痕跡,說明整個社會(hui)生(sheng)產(chan)力有了飛躍的(de)進步(bu)。特別值得注意的(de)是(shi),發(fa)(fa)現(xian)的(de)14件銅器(qi)中有斧、刀、鑿裝飾品和(he)魚(yu)鉤,還有制(zhi)造銅斧的(de)范,標志(zhi)著(zhu)當地(di)冶金(jin)術的(de)發(fa)(fa)展。這(zhe)些銅器(qi)雖然粗(cu)糙、簡(jian)單(dan),但后來云(yun)南光輝燦(can)爛的(de)青銅文(wen)(wen)化是(shi)從這(zhe)里開(kai)始(shi)(shi)的(de)。由于生(sheng)產(chan)工具的(de)改造,農業、畜牧業和(he)漁獵(lie)均(jun)很(hen)發(fa)(fa)達。遺址(zhi)中發(fa)(fa)現(xian)的(de)粳稻大概一(yi)直(zhi)是(shi)遠古時(shi)(shi)期云(yun)南地(di)區栽培主(zhu)要(yao)稻種(zhong)。從測(ce)定的(de)遺址(zhi)形成(cheng)(cheng)時(shi)(shi)間看(kan),當時(shi)(shi)云(yun)南剛(gang)剛(gang)跨(kua)進階級(ji)社會(hui)的(de)大門,而我國中原地(di)區正處在殷商晚期。截止目前(qian)所知,海門口遺址(zhi)是(shi)云(yun)南銅石(shi)(shi)(shi)并用文(wen)(wen)化早發(fa)(fa)源地(di),標志(zhi)著(zhu)云(yun)南地(di)區利用金(jin)屬(shu)的(de)開(kai)始(shi)(shi)。