The present invention discloses a quick joint for connecting gas cylinder and pressure reducing valve for gas stove, and the quick joint includes a connecting ring having a through hole, and arc brackets extended from the periphery of the connecting ring and encircled into a ring shape, and each arc bracket includes a positioning groove for installing a spring clamp. When the quick joint is operated, a connecting ring is installed between the pressure reducing valve and the middle of a joint pipe of the pressure reducing valve, and the pressure reducing valve is sheathed onto the gas cylinder, and a spring clamp is used for loosening and binding the connecting ring for installing or removing a screw type pressure reducing valve and a push-button type gas cylinder, and thus providing a safe and quick use.