The invention provides a self-service popcorn machine. The self-service popcorn machine comprises a housing, a quantifying mechanism, a blocking mechanism, a stirring mechanism, a discharging mechanism and a transmission mechanism, wherein the housing is provided with a processing part and a control part, the processing part comprises a material storage area, a to-be-processed area, a popcorn area and a discharging area from top to bottom, the transmission mechanism is arranged at the control part, the transmission mechanism is used for driving the quantifying mechanism to communicate or separate the material storage area and the to-be-processed area, driving the discharging mechanism to communicate or separate the to-be-processed area and the popcorn area, driving the stirring mechanism to stir in the popcorn area and driving the discharging mechanism to communicate or separate the popcorn area and the discharging area, so that after the popcorn machine is started by a user, the transmission mechanism firstly drives the quantifying mechanism to separate the material storage area and the to-be-processed area, then the transmission mechanism drives the blocking mechanism to communicate the to-be-processed area and the popcorn area and drives the stirring mechanism to stir, and after a given time, the transmission mechanism drives the discharging mechanism to communicate the popcorn area and the discharging area.