The invention relates to a compact closed type pressurized hydraulic system profile extruding machine. The compact closed type pressurized hydraulic system profile extruding machine comprises a fixedbase, an extrusion part, an oil supply part and a main electric cabinet, wherein the extrusion part, the oil supply part and the main electric cabinet are arranged on the fixed base, the oil supply part comprises a pressurized oil cylinder, an oil way plate, a cooling mechanism, a motor pump set, a hydraulic loop and a liquid filling valve, the pressurized oil cylinder is composed of an oil storage cylinder barrel and a pressurization cylinder, the oil way plate is a control assembly of all the oil cylinders of the extruding machine, the cooling mechanism is used for cooling hydraulic oil, themotor pump set is used for generating high-pressure system pressure of the hydraulic oil when the extruding machine works, the hydraulic loop comprises a pump oil suction pipe, an oil delivery pipe I, an oil delivery pipe II, a working oil pipe I, a working oil pipe II and an oil return pipe, and the liquid filling valve is arranged on the main oil cylinder and communicates with the oil storage cylinder barrel. According to the compact closed type pressurized hydraulic system profile extruding machine, when the extruding machine is used, the use amount of the hydraulic oil is small, the temperature of the hydraulic oil can be effectively controlled during working, the service life of the hydraulic oil is effectively prolonged, and the use cost of equipment is also saved.