遺址發現(xian)文物近(jin)千件,其中(zhong)陶(tao)(tao)器(qi)(qi)(qi)(qi)475件,石(shi)(shi)(shi)器(qi)(qi)(qi)(qi)169件,骨(gu)器(qi)(qi)(qi)(qi)六七十(shi)件,銅器(qi)(qi)(qi)(qi)14件。陶(tao)(tao)器(qi)(qi)(qi)(qi)有(you)(you)(you)夾沙和硬陶(tao)(tao)兩種,前者(zhe)皆(jie)手制(zhi)(zhi),后(hou)(hou)者(zhe)輪(lun)制(zhi)(zhi),且有(you)(you)(you)花(hua)紋(wen)(wen)。陶(tao)(tao)器(qi)(qi)(qi)(qi)很少(shao)完整,其中(zhong)以網(wang)墜為(wei)多。石(shi)(shi)(shi)器(qi)(qi)(qi)(qi)有(you)(you)(you)斧、錛、鑿、刀(dao)、鏃、錐(zhui)、環(huan)、紡輪(lun)、磨(mo)石(shi)(shi)(shi)等(deng)(deng)。石(shi)(shi)(shi)刀(dao)全(quan)部穿(chuan)(chuan)孔(kong)(kong)(kong)(kong),有(you)(you)(you)單(dan)孔(kong)(kong)(kong)(kong)、雙孔(kong)(kong)(kong)(kong),也有(you)(you)(you)磨(mo)槽后(hou)(hou)穿(chuan)(chuan)孔(kong)(kong)(kong)(kong)的(de)。骨(gu)角器(qi)(qi)(qi)(qi)有(you)(you)(you)針、錐(zhui)、紡輪(lun)、磨(mo)石(shi)(shi)(shi)等(deng)(deng)。石(shi)(shi)(shi)刀(dao)全(quan)部穿(chuan)(chuan)孔(kong)(kong)(kong)(kong),有(you)(you)(you)單(dan)孔(kong)(kong)(kong)(kong)、雙孔(kong)(kong)(kong)(kong),也有(you)(you)(you)磨(mo)槽后(hou)(hou)穿(chuan)(chuan)孔(kong)(kong)(kong)(kong)的(de)。骨(gu)角器(qi)(qi)(qi)(qi)有(you)(you)(you)針、錐(zhui)、紡輪(lun)、穿(chuan)(chuan)孔(kong)(kong)(kong)(kong)獸(shou)牙、穿(chuan)(chuan)孔(kong)(kong)(kong)(kong)骨(gu)片等(deng)(deng)。銅器(qi)(qi)(qi)(qi)有(you)(you)(you)斧、鋮、刀(dao)、鑿、環(huan)、魚鉤和裝飾(shi)品(pin),還(huan)發現(xian)半塊(kuai)陶(tao)(tao)范,范上花(hua)紋(wen)(wen)與一把銅斧花(hua)紋(wen)(wen)相吻合。此外,遺址中(zhong)有(you)(you)(you)四處發現(xian)谷(gu)(gu)物,出(chu)土(tu)時均成黑色。經有(you)(you)(you)關(guan)部門鑒定(ding),出(chu)土(tu)谷(gu)(gu)物屬于粳稻類型。還(huan)有(you)(you)(you)大量獸(shou)骨(gu)出(chu)土(tu)。
經(jing)中(zhong)國科學院考古研究所實驗室放射性碳素測(ce)定,海(hai)門口出土(tu)圓(yuan)木樁,距今已3115±90年(公元(yuan)前(qian)(qian)1150±90年)。經(jing)過樹(shu)輪較正后的(de)數據為公元(yuan)前(qian)(qian)1335±155年。
海(hai)門(men)口遺(yi)址(zhi)出土文(wen)物,屬銅石并用(yong)時期文(wen)化,這一(yi)(yi)遺(yi)址(zhi)的(de)(de)(de)(de)(de)發現,反映出云(yun)(yun)南(nan)原始社會(hui)末期之(zhi)社會(hui)面貌,說明當(dang)時這里(li)已形成一(yi)(yi)個濱水的(de)(de)(de)(de)(de)村落,村落房屋為一(yi)(yi)種干(gan)欄建(jian)筑,與近(jin)代云(yun)(yun)南(nan)一(yi)(yi)些少數民族(zu)房屋相似。遺(yi)址(zhi)發現的(de)(de)(de)(de)(de)器(qi)物,具(ju)有(you)洱海(hai)地(di)(di)區新石器(qi)文(wen)化若(ruo)干(gan)特征,無(wu)論石器(qi)或骨(gu)器(qi),都磨得整(zheng)齊精致,陶(tao)器(qi)開(kai)始出現輪制痕跡(ji),說明整(zheng)個社會(hui)生(sheng)產(chan)力有(you)了飛(fei)躍的(de)(de)(de)(de)(de)進步。特別值(zhi)得注意的(de)(de)(de)(de)(de)是(shi),發現的(de)(de)(de)(de)(de)14件銅器(qi)中有(you)斧(fu)、刀、鑿裝(zhuang)飾(shi)品和魚鉤,還有(you)制造銅斧(fu)的(de)(de)(de)(de)(de)范,標志(zhi)著當(dang)地(di)(di)冶金(jin)(jin)術的(de)(de)(de)(de)(de)發展。這些銅器(qi)雖(sui)然粗(cu)糙、簡單,但后來(lai)云(yun)(yun)南(nan)光輝燦(can)爛的(de)(de)(de)(de)(de)青銅文(wen)化是(shi)從這里(li)開(kai)始的(de)(de)(de)(de)(de)。由(you)于生(sheng)產(chan)工具(ju)的(de)(de)(de)(de)(de)改造,農業、畜(chu)牧業和漁獵均(jun)很發達。遺(yi)址(zhi)中發現的(de)(de)(de)(de)(de)粳(jing)稻大概一(yi)(yi)直是(shi)遠古時期云(yun)(yun)南(nan)地(di)(di)區栽培主要稻種。從測定的(de)(de)(de)(de)(de)遺(yi)址(zhi)形成時間看(kan),當(dang)時云(yun)(yun)南(nan)剛剛跨進階級(ji)社會(hui)的(de)(de)(de)(de)(de)大門(men),而我國中原地(di)(di)區正處在(zai)殷商晚期。截止目前所知(zhi),海(hai)門(men)口遺(yi)址(zhi)是(shi)云(yun)(yun)南(nan)銅石并用(yong)文(wen)化早(zao)發源(yuan)地(di)(di),標志(zhi)著云(yun)(yun)南(nan)地(di)(di)區利用(yong)金(jin)(jin)屬的(de)(de)(de)(de)(de)開(kai)始。