全城(cheng)(cheng)(cheng)(cheng)是一(yi)座(zuo)400×400平方(fang)米(mi)的(de)方(fang)形古(gu)(gu)城(cheng)(cheng)(cheng)(cheng)址(zhi)。城(cheng)(cheng)(cheng)(cheng)墻四角正(zheng)處(chu)(chu)在(zai)東(dong)南西北(bei)方(fang)位(wei)線上。殘高(gao)(gao)4-5米(mi)底寬15-20米(mi),城(cheng)(cheng)(cheng)(cheng)之(zhi)南北(bei)各一(yi)城(cheng)(cheng)(cheng)(cheng)門(men)。古(gu)(gu)城(cheng)(cheng)(cheng)(cheng)內西北(bei)角建有90×90平方(fang)米(mi)的(de)正(zheng)方(fang)形小(xiao)城(cheng)(cheng)(cheng)(cheng)(居民稱(cheng)之(zhi)為馬圈(quan)),東(dong)開門(men),高(gao)(gao)處(chu)(chu)達3米(mi)多,底寬5米(mi)。在(zai)城(cheng)(cheng)(cheng)(cheng)內拾到(dao)大量(liang)戰國、秦漢(han)時代(dai)的(de)陶片、貨幣、兵器、建筑(zhu)構件等。史(shi)料記載,此城(cheng)(cheng)(cheng)(cheng)乃為戰國東(dong)漢(han)時代(dai)的(de)古(gu)(gu)城(cheng)(cheng)(cheng)(cheng),形制保存完好。土城(cheng)(cheng)(cheng)(cheng)子(zi)這個地(di)區名也由(you)此城(cheng)(cheng)(cheng)(cheng)而(er)命之(zhi)。
土城(cheng)子古(gu)城(cheng)由自治(zhi)區(qu)文物(wu)保護單(dan)位(wei)升級文物(wu)保護單(dan)位(wei)。2013年5月3日(ri),中(zhong)華人(ren)民共(gong)和國國務院公布第七批國家(jia)文物(wu)保護單(dan)位(wei),其中(zhong)土城(cheng)子古(gu)城(cheng)榜(bang)上(shang)。