A LED lamp assembly is disclosed. The LED lamp assembly includes a heat radiator, a base body and a cover body. The base body is located on one end of the heat radiator and the cover body is located on the other end of the heat radiator. The base body has a plurality of first engaging parts, each of which is associated with a first engaging portion. The cover body has a plurality of second engaging parts, each of which is associated with a second engaging portion. The first engaging portion is configured to correspond to and engage with the second engaging portion so as to sandwich the heat radiator between the base body and the cover body.