The invention discloses a buried oil tank lining transformation technology. The buried oil tank lining transformation technology comprises the steps that oil tank inner wall cleaning and rust removal,drying, inner component treatment, primer layer brush application, leakage detecting and repairing, first anti-leakage layer pavement, first structure layer pavement, hollow layer pavement, second structure layer pavement, second anti-leakage layer pavement, third structure layer pavement, anti-impact plate arranging and anti-static layer pavement are conducted,and finally, pressure monitoring equipment of a gap layer is arranged in a manhole well, a line is guided to display monitoring equipment in a station room through a buried protection pipe, and transformation is finished after qualification is achieved through debugging. According to the buried oil tank lining transformation technology, lining transformation is directly conducted on a buried oil tank, oil tank replacement or excavation is not needed, and therefore the input cost is greatly reduced; since the buried oil tank is located underground for a long term, mud and sand backfilled on the periphery are relatively stable after being settled for a long term, the oil tank pipe wall stress is relatively balanced, and after oil tank lining treatment, the strength of the oil tank wall is improved.