The invention discloses a method for improving the memory cutting execution precision of a coal mining machine. The method comprises the following steps of: (1) acquiring data, (2) determining input variables and an output variable, (3) setting discourse domain elements of the input variables e and c and the output variable delta beta2 and quantifying factors k1, k2 and k3, (4) determining a fuzzy control rule, (5) constructing a fuzzy control table, and (6) after the fuzzy control table is constructed, storing the fuzzy control table in a coal mining machine controller, in the running process of the coal mining machine, correcting a change range of the height of a roller of the coal mining machine in real time according to a fuzzy classification of the height change of a base plate, and adjusting an inclination angle of a swing arm according to the change range. Compared with the prior art, the method has the advantages that the memory cutting execution precision of the coal mining machine can be effectively improved and the flatness of a cutting path of the coal mining machine is improved to a certain extent.