The invention relates to a grouting machine with a static weighing system and a using method of the grouting machine. The grouting machine comprises a feeding device, a high-speed stirring tank, a material storage tank and the weighing system, wherein the high-speed stirring tank communicates with a material outlet of the feeding device; the material storage tank communicates with a material outlet of the high-speed stirring tank; the weighing system comprises a PLC, a weighing sensor arranged at the bottom of the high-speed stirring tank and a motor controlled by the PLC; and the motor is connected with a high-speed stirring tank stirring device. During operation, the PLC controls the feeding device and the high-speed stirring tank stirring device to work in a coordinating mode; when the weight reaches a certain degree, the high-speed stirring tank stirring device stops working automatically so that the weighing accuracy can be effectively guaranteed; and meanwhile, the PLC can automatically finish whole-course metering control strictly according to the formula of grout, the weighing error of each plate can be controlled within +/-0.5%, and the weighing accuracy is not reduced while continuous operation control is performed.