Provided is a multi-stage poppet valve including: a flow pipe in which a channel through which a fluid flows is formed; a fixing part extended inwardly from an inner peripheral surface of the channel of the flow pipe, and having a first channel formed therein, the first channel being hollowed in a vertical direction and having the fluid flowing therethrough; a main valve part disposed on the fixing part, having a second channel formed at the center of an inner portion thereof, and vertically moved by force acting in the vertical direction to open and close the first channel, the second channel having the fluid flowing therethrough; and an auxiliary valve part vertically moved in the second channel by force acting in the vertical direction to open and close the second channel, thereby controlling a flow rate of the fluid passing through the second channel.