The invention relates to an IGBT over-current detection circuit capable of adjusting over-current points continuously and a realizing method thereof. An IGBT collector electrode is connected with the cathode of a first diode, the anode of the first diode is connected to a first voltage follower circuit composed of a first operational amplifier and a resistor, and the output end of the first operational amplifier is connected to a first phase reversal proportional gain circuit composed of a second operational amplifier and a resistor; the output end of the second operational amplifier is connected to a second phase reversal proportional gain circuit composed of a third operational amplifier, an adjustable resistor and a resistor, the output end of the third operational amplifier is connected to a second voltage follower circuit composed of a fourth operational amplifier and a resistor, the output end of the fourth operational amplifier is connected to the cathode of a second diode through a resistor, and the anode of the second diode is connected with the over-current protection end of a driving chip. By the adoption of the IGBT over-current detection circuit, linear, continuous and bidirectional adjustment of the IGBT over-current points can be achieved, so that the requirement of relevant products for consistency, accuracy and adjustability of the IGBT over-current points is met.