The invention relates to the field of key switches and in particular to a programmable key switch. The programmable key switch comprises a substrate, an upper cover, a guide core of which one end passes through the upper cover and which is connected with the substrate and used for pressing, an elastic sheet which is installed between the guide core and the upper cover and used for electric conduction, and a spring which is installed in the upper cover and positioned in a guide core hole for the reset of the guide core. The programmable key switch further comprises a resistor component which isinstalled between the upper cover and the substrate and used for changing and outputting an electric signal, an IC component which is connected with the resistor component and used for programming the changed electric signal, and a PCB board which is positioned at the bottom of the substrate. The resistor component comprises a base plate, a conductor and a resistor which are printed on the base plate and used for controlling the change of a resistance value, and a terminal which is connected with one end of the conductor and the resistor and used for outputting the electric signal. The IC component is connected with the terminal. The terminal and the IC component are connected with the PCB board so as to output the changed electric signal. The programmable key switch is capable of, through the size of a pressing force and the size of a pressing speed, changing the output speed and pressure of a computer, so the better user experience is provided.