The invention relates to the field of laser cutting, in particular to a quick laser scanning and cutting method. The method comprises graphic processing software for acquiring graphic processing, machining control software for controlling a computer numerical control (CNC) system, the CNC system for controlling a machine tool servo and a laser device, a field programmable gate array (FPGA) system for processing and transferring signals, the servo for controlling a machine tool to move and the laser device which is used for producing lasers to carry out cutting and is provided with a pulse width modulation (PWM) switching system. The quick laser scanning and cutting method is characterized in that the method comprises the following steps that starting is carried out, a graph is input, a scanning and cutting pattern is generated, a position comparison and output instruction is generated, machining is started, position comparison is conducted, an output instruction is carried out, and stopping is conducted. Compared with the prior art, cutting and air moving paths of machining motion are optimized through a cutting line scanning mode, acceleration times and deceleration times in the motion process are decreased effectively, and the average speed of cutting and the average speed of air moving are increased; accordingly, the cutting motion time and the air moving motion time are shortened, and the purpose of quick cutting is achieved.