Coil nail capable of preventing cap from falling off

The utility model discloses a coil nail capable of preventing a cap from falling, which relates to the technical field of coil nails and comprises a coil nail, a fixing ring is sleeved on the inner wall of the coil nail, and two groups of trapezoidal clamping blocks are slidably arranged on two sides of the fixing ring on the inner wall of the coil nail. Through the arrangement of the coil nail, the fixing ring, the trapezoidal clamping block, the lower rubber block and the upper rubber block, the problem that a nail cap arranged at the top end of an existing coil nail is prone to falling off is solved, a nail body in the coil nail needs to be nailed into a plate after the coil nail is installed in a nail gun, and in the process, the nail body is not prone to falling off due to the fact that impact of the nail gun is too large. When the coil nail is nailed into a plate, two groups of trapezoidal clamping blocks are clamped with the inner wall of a fixing ring under the extrusion force of the plate, and the co