The invention discloses a construction method for an underground city based on an abandoned mine. The construction method comprises the steps that a pier stud filling method is adopted to recycle industrial square protective coal pillars to form a construction space of the underground city; treatments of skin rolling and beautifying, anchoring and shotcreting and pier-stud-filling reinforced supporting are connected on main roadways and surrounding chambers, and then decoration construction is conducted on the main roadways and the surrounding chambers to form underground business streets; and return-air-shaft protective coal pillars at two sides are recycled through the pier stud filling method to form a regular building space, therefore, the 'one-core, double-city, double-axis and multi-area' construction layout and a main body frame of the underground city are formed, moreover, the whole underground city is equipped with systems of electrical power, ventilation, garbage collection, domestic water, air conditioner, communication, traffic, fire protection and the like, and then self-sufficiency of water, electricity, air and heat of the underground city is achieved. According to the construction method for the underground city based on the abandoned mine, the characters of the abandoned mine are utilized to develop the underground building space, the purposes of enhancing the use ratio of land resources, protecting the environment, relieving the ground traffic pressure and the like are achieved, and optimization of mine resource utilization is achieved.