全(quan)城(cheng)(cheng)(cheng)是一座400×400平方(fang)(fang)(fang)米(mi)(mi)的方(fang)(fang)(fang)形(xing)古(gu)城(cheng)(cheng)(cheng)址。城(cheng)(cheng)(cheng)墻(qiang)四角正(zheng)處在東(dong)南西(xi)(xi)北(bei)方(fang)(fang)(fang)位線上。殘高4-5米(mi)(mi)底(di)寬(kuan)15-20米(mi)(mi),城(cheng)(cheng)(cheng)之南北(bei)各一城(cheng)(cheng)(cheng)門(men)。古(gu)城(cheng)(cheng)(cheng)內西(xi)(xi)北(bei)角建有90×90平方(fang)(fang)(fang)米(mi)(mi)的正(zheng)方(fang)(fang)(fang)形(xing)小城(cheng)(cheng)(cheng)(居民稱之為(wei)馬(ma)圈),東(dong)開門(men),高處達3米(mi)(mi)多(duo),底(di)寬(kuan)5米(mi)(mi)。在城(cheng)(cheng)(cheng)內拾到大量戰國(guo)、秦漢(han)時(shi)代(dai)的陶片、貨幣、兵器、建筑構件等。史料記(ji)載,此城(cheng)(cheng)(cheng)乃為(wei)戰國(guo)東(dong)漢(han)時(shi)代(dai)的古(gu)城(cheng)(cheng)(cheng),形(xing)制保存完好。土城(cheng)(cheng)(cheng)子這個地(di)區名也由此城(cheng)(cheng)(cheng)而命之。
土城(cheng)子古(gu)城(cheng)由自治區文物保護(hu)單(dan)位(wei)升(sheng)級文物保護(hu)單(dan)位(wei)。2013年(nian)5月3日(ri),中(zhong)華人民共和國(guo)國(guo)務院公布第(di)七批國(guo)家文物保護(hu)單(dan)位(wei),其中(zhong)土城(cheng)子古(gu)城(cheng)榜上。