Upper end track beam connecting joint of electric sliding door

The invention discloses an upper end track beam connecting joint of an electric sliding door. The upper end track beam connecting joint comprises a hanger rail assembly, reinforced profile steel and a connecting plate; the hanger rail assembly comprises a track beam and a hanger rod; one end of the hanger rod is connected with the middle of a groove of the track beam, and the top of one end of the hanger rod is provided with a hanger rod connecting plate extending out of the end face; the reinforced profile steel is arranged at the included angle between the hanger rod connecting plate and the hanger rod; the track beam is used for supporting and blocking a door top roller; the reinforced profile steel is used for stabilizing connection among a rod piece of a truss, a hanger rod connecting face and the hanger rod; the connecting plate is integrally attached to the rod piece of the truss and the reinforced profile steel; and a reinforcing plate for reinforcing stability is further arranged at the joint of the