Lottery ticket printer

The invention discloses a lottery ticket printer. The lottery ticket printer comprises a master control MCU (Micro Control Unit), wherein the master control MCU is connected with a serial port communication module, a thermo-sensitive printing head, an external extended serial Flash, a motor drive module and a power supply module; the front face of the thermo-sensitive printing head comprises a movable rolling shaft, a thermo-sensitive heating head, a paper lack sensor and a drum release pull rod; a motor drive module is connected with a paper cutting motor and a paper feeding motor on the side face of the thermo-sensitive printing head; the master control MCU is also connected with a mono-stable trigger; the circuit of the mono-stable trigger is included in a drive circuit of the thermo-sensitive printing head; the master control MCU is used for controlling the mono-stable trigger to output high and low level to produce a mono-stable signal with proper pulse width to the power supply module; the power supply module is used for performing time-limited power supply on the thermo-sensitive printing head according to the received mono-stable signal. A relay is substituted by using the mono-stable trigger, and the problem that the life of the lottery ticket printer is affected by larger electromagnetic interference produced by control of power supply heating by using the relay of the existing lottery ticket printer is solved.