The invention discloses an excavator multifunctional machine tool flow and pressure control system. The system comprises a main pump, a main control valve, a current-limiting electromagnetic valve, anelectromagnetic valve set, a bidirectional foot valve, a hydraulic control reversing valve, a proportional overflow valve, a stop valve, a one-way machine tool, a bidirectional machine tool, a hydraulic oil tank, a main controller, a control panel and related hydraulic pipelines and electric wire harnesses; and the control panel transmits electrical signals to the main controller, and the main controller separates out four paths of current signals to control the proportional overflow valve, the current-limiting electromagnetic valve, and an A1-connected electromagnetic valve and an A2-connected electromagnetic valve of the electromagnetic valve set correspondingly. According to the system, on the basis of an original multifunctional machine tool hydraulic pipeline, the electro-hydraulic proportional technology and the electric control technology are combined, so that the accurate control over the hydraulic system flow and pressure is realized, the operator only needs to manually inputthe required flow and pressure values on the control panel, and then the system can be used by the different machine tools.