The invention discloses a fixed abnormal sound-preventing clamping mounting structure, including a vehicle body mating surface, an end cap and an outer tube, and being characterized in that the outertube is fixedly connected with the end cap by rivets, the outer tube is a hollow cavity, a fixed shaft is arranged inside the outer pipe, one end of the fixed shaft is fixedly connected with the end cap, the surface of the other end of the fixed shaft is sleeved with a rotary sleeve, the surface of the rotate sleeve is sleeved with an inner tube, the end cap is connected with a rotary buckle, anda spring is arranged at the gap between the rotary buckle and the end cap. The mounting structure is used for mounting a shutter curtain and the vehicle body, the thumb compresses the rotary buckle tothe bottom before the shutter curtain is installed, at the moment, the spring is compressed to the bottom, then the shutter curtain is mounted on the vehicle body from top to bottom, until front andrear elastic limiting sleeves of the shutter curtain are in zero contact with the front and rear sides of a vehicle body mounting groove, at this moment, the thumb is released to allow the rotary buckle to rebound freely, the rotary buckle and the vehicle body mating surface are pushed tightly, and the outer tube and the end cap are fixed by the rivets, so as to avoid the common abnormal sound phenomenon of such products.