The invention provides an automatic compensation control method for the coal feeding quantity of a cement kiln system. The automatic compensation control method is applied to the technical field of cement clinker production intelligent control. The automatic compensation control method for the coal feeding quantity of the cement kiln system includes the following automatic compensation control steps that an operator opens an inlet decomposing furnace bin pneumatic valve (3); the operator then closes an inlet kiln head bin pneumatic valve (4); the inlet decomposing furnace bin pneumatic valve (3) feeds back a signal to a control part at the moment; meanwhile the control part collects the pressure value obtained after changing of a decomposing furnace bin coal feeding scale draught fan outlet; and the control part obtains the pressure change value of the decomposing furnace bin coal feeding scale draught fan outlet. By means of the automatic compensation control method for the coal feeding quantity of the cement kiln system, fluctuation brought by changing of the coal dust conveying amount during bin switching can be lowered, stability of temperature control is improved, meanwhile, the labor intensity of the operator is effectively lowered, stability of system adjustment is improved, and the adaptability and online rate of the system are improved.