The invention discloses a method for calculating real pressure and reserves of a low-permeability gas reservoir by using production data. The method comprises the following steps: S1, exporting the production data of a certain well in a gas field development information network; S2, reading the casing pressure, the daily gas production rate, the accumulated gas production rate and the accumulatedwater production rate in the production data, and calculating the flowing bottomhole pressure Pwf through the casing pressure; S3, assuming an original pressure Pi of a gas reservoir, and solving a yield equation; S4, trying to cut the original pressure Pi, and observing the linear shape until the linear correlation is satisfactory; and S5, calculating single-well control reserves G. According tothe method, the controlled reserves of the low-permeability gas reservoir are solved by using a material balance method, and a material balance equation can form linear formation pressure, namely thesolved pressure, by continuously trying to cut off the pressure, and meanwhile, the controlled reserves of a single well are also solved.