The invention discloses an electrodeless fluorescent lamp voltage stabilization constant current power source based on a source electrode amplification circuit. The electrodeless fluorescent lamp voltage stabilization constant current power source is characterized by mainly comprising a transformer T1, a diode rectifier U, a pulse transformation circuit, a polar capacitor C1, a voltage stabilization diode D1, the source electrode amplification circuit connected with a negative electrode output end of the diode rectifier U, a voltage detection circuit connected in series between a positive output end of the diode rectifier U and the source electrode amplification circuit, a buffer triggering circuit connected in series between the source electrode amplification circuit and the pulse transformation circuit, and a voltage-controlled oscillation circuit connected in series between the source electrode amplification circuit and the buffer triggering circuit. According to the power source, a voltage is modulated into a high frequency pulse width voltage, an output pulse peak value is kept to be stable through transformation of the pulse transformer, an output voltage is made to be consistent with a rated start voltage of an electrodeless fluorescent lamp, and stable voltage output is guaranteed.