The invention discloses an ultra-thick coating hot galvanized steel strip for an underground pipe gallery corrugated pipe and a production method thereof. The hot galvanized steel strip comprises thefollowing chemical components of, in percentage by mass, 0.045%-0.065% of C, 0.15%-0.25% of Mn, less than or equal to 0.020% of S, less than or equal to 0.020% of P, less than or equal to 0.03% of Si,greater than or equal to 0.020% of Als, and balance iron and inevitable impurities; the production method comprises converter smelting, LF refining, continuous casting , hot rolling, cold rolling andgalvanizing processes. According to the ultra-thick coating hot galvanized steel strip for the underground pipe gallery corrugated pipe and the production method thereof, proper mechanical propertiesof the steel strip are guaranteed through reasonable component design and hot rolling and galvanizing annealing process design; and through reducing the height of an air knife, increasing the distance between a knife lip and the strip steel and sectional control measures of the opening degree of the air knife lip, the generation of zinc rhyolite and edge thickness defects is inhibited, the requirement of the underground pipe gallery industry on the ultra-thick coating hot galvanized steel strip is met, and remarkable economic benefits are achieved.