The invention discloses an improved type band-shaped line high-power microwave switch and a manufacturing method thereof. The switch comprises a first high frequency socket, a second high frequency socket, a third high frequency socket, a microwave switch box body, a center conductor core wire, an upper cover plate, a first coaxial type PIN diode, a second coaxial type PIN diode, a third coaxial type PIN diode, a fourth coaxial type PIN diode, a first microwave structure capacitor, a second microwave structure capacitor, a third microwave structure capacitor, a fourth microwave structure capacitor, a first copper foil, a second copper foil , a third copper foil, a fourth copper foil, a first feedthrough capacitor, a second feedthrough capacitor, a third feedthrough capacitor, a fourth feedthrough capacitor, a first winding inductor, a second winding inductor, a third winding inductor, a fourth winding inductor, a drive control PCB board, a first glass insulator, a second glass insulator, a third glass insulator, a fourth glass insulator and a lower cover plate. The microwave switch reduces the insertion loss and improves the bearing large power.