Boot sealing a cable connector

The present invention relates to a boot and connector assembly. The boot has a through hole passing therethrough and a boot body enclosing the through hole, the boot body comprising: a neck sealing portion presenting a substantially cylindrical shape, wherein the neck sealing portion has an inner diameter maintained substantially constant; a body portion located at the proximal side of the neck sealing portion and presenting a generally cylindrical shape, wherein the body portion has an inner diameter and an outer diameter that are both greater than the inner diameter and the outer diameter of the neck sealing portion; and a gap passing portion connecting the neck sealing portion to the body portion and having a substantially frustoconical shape, wherein the gap passing portion has an inner diameter gradually increasing from the inner diameter of the neck sealing portion to the inner diameter of the body portion, and an outer diameter gradually increasing from the outer diameter of the neck sealing portion to the outer diameter of the body portion. The boot of the present disclosure effectively solves the problem that the boot interferes with other components so that the boot is unable to extend to the antenna panel when the mounting space is small, and also has the advantages of simple to manufacture, convenient to mount and high efficiency.