The utility model relates to an integrated safe car seat for children, including the back, cushion and be used for adjusting the height regulating mechanism of the high position of cushion, height regulating mechanism is including setting up the cross strut between cushion and floor board, can set up on floor board and the surface establishes that the screwed dwang reaches and dwang threaded connection's a coupling assembling with rotating along self axial lead, the cross strut includes first vaulting pole and second vaulting pole, the upper and lower both ends of first vaulting pole respectively with the cushion, floor board rotates ground and sets up, the upper and lower both ends of second vaulting pole respectively with the cushion, floor board rotates ground and sets up, the upper end of first vaulting pole, the lower tip of second vaulting pole still sets up along the fore -and -aft direction of seat respectively with sliding, the dwang extends along the fore -and -aft direction of seat, a coupling assembling is connected with the lower tip of second vaulting pole. The utility model discloses can use in order to satisfy different children according to children's the height or the height of age regulation cushion, also can supply the adult to use simultaneously.