Key cap color changing structure and production process

The invention discloses a keycap color-changing structure and a production process, and relates to the technical field of keycap production, a keycap base comprises a mounting groove with an upper end opening, an upper end substrate, a first light-transmitting plate mounted at the upper end opening of the mounting groove, a middle layer substrate mounted in the mounting groove, a second light-transmitting plate mounted at the lower end opening of the upper end substrate and penetrating through the upper end substrate up and down, and a third light-transmitting plate mounted in the middle layer substrate and penetrating through the middle layer substrate up and down; the first display part is provided with a second light-transmitting plate and a color ink layer, has certain light transmittance and is formed on the second light-transmitting plate, the third display part and the second display part are spliced to form a metallic luster surface, and the first inner wall is provided with a reflecting mirror surfac