Seat integrated sleeping support

The invention relates to a vehicle seat sleeping device, in particular to a seat integrated sleeping support which is characterized in that one end of a cantilever barrel 5 is connected with a seat 8 through a rotating shaft 4, the tail end of the cantilever barrel 5 is provided with a stepped groove 30, a vertical groove 27 and a knob 9 in threaded connection, a telescopic arm 10 connected through a key 28 is arranged in the cantilever barrel 5, and the key 28 is connected with the tail end of the stepped groove 30 through a spring 29. The telescopic arm 10 is provided with a key groove 31 and a chest plate 12 connected through a rotating shaft 11, the front end of the telescopic arm 10 is provided with a sleeve 22, one end of the sleeve 22 is provided with a clamping groove 20, the sleeve 22 is internally provided with a corner frame 19, the corner frame 19 is provided with a clamping column 21, one end of the corner frame 19 is provided with a knob 23 in threaded connection, the other end of the corner fra