The invention discloses an ignition current monitoring circuit for a launch control device. The ignition current monitoring circuit is used for monitoring and controlling ignition current output from an ignition power supply of the launch control device, and comprises electromagnetic relays K1 to K3, a power amplifier U1, a current sensor U2, triodes P1 to P3, and current-limiting resistors R1 to R11. The positive output end of the ignition power supply is connected to the point a of the external interface of the control device successively via the K3-1, the COM3-1, the R1, the K2-1, the COM2-1, the K1-1K, and the COM1-1. The negative output end of the ignition power supply is connected to the point b of the external interface of the control device successively via the K3-2, the COM3-2, the K2-2, the COM2-2, the K1-2K, and the COM1-2. The current sensor U2 senses and outputs the ignition current. The point 1 of the current output port of the U2 is connected to the negative input end of the power amplifier U1. The point 2 of the current output port of the U2 is connected to ground. The positive input end of the U1 and the negative output end of the U1 are connected and then are introduced into a main controller. The emitters of the triodes are connected to the ground. The bases of the triodes are connected to a control signal. The collectors of the triodes are connected to V1 through resistors. A solenoid is connected between the V1 and the collectors so that the control signal controls the on-off state of the solenoid.