The hydraulic system of HGMA brick machine is an independent hydraulic device, which supplies oil according to the requirements of the driving device (main machine) and controls the direction, pressure and flow of the oil flow. It is applicable to various hydraulic machines where the main machine and the hydraulic device can be separated. The motor drives the oil pump to rotate. The pump draws oil from the oil tank and pumps oil, and converts the mechanical energy into the pressure energy of the hydraulic oil.