The invention relates to an extraction device of a pressure-type coffee machine, comprising a pressing component driven by a handle and capable of moving up and down. An effluent pressure block is mounted at the bottom of the pressing component; a water inlet is extensionally arranged upward in the middle of the effluent pressure block; the coffee machine is provided with a fixed base at the lower part of the effluent pressure block; the fixed base is internally provided with a coffee collector and a filter screen; an inner cavity is arranged at the bottom of the effluent pressure block; the inner cavity is provided with an auxiliary pressure block capable of being moved downward by water pressure; a limit device for restricting the maximum downward-moving distance of the auxiliary pressure block is arranged between the effluent pressure block and the auxiliary pressure block; a water inlet hole is arranged in the middle of the auxiliary pressure block; a peripheral groove is arranged at the periphery of the auxiliary pressure block and sleeved with a water distribution sealing ring; a groove and a rubber ring are arranged at the bottom of the auxiliary pressure block; the position of the rubber ring corresponds to that of a flange on the filter screen; and the inner side at the bottom of the auxiliary pressure block surrounded by grooves and the filter screen form a coffee extraction cavity together. The product is simple in structure and convenient to operate and saves power.