SEAT LYING ADJUSTMENT MECHANISM AND CHILD SAFETY SEAT

The present invention belongs to the field of child safety seats and provides a seat lying adjustment mechanism for adjusting a cushion and a backrest plate which are hinged to each other, wherein one side away from a hinge position with the backrest plate of the cushion is fixed, the seat lying adjustment mechanism includes a backrest plate pulling assembly and a safety belt guiding assembly; the backrest plate pulling assembly includes: a handle for driving the backrest plate to move along a length extension direction of the backrest plate, so that the hinge position of the cushion and the backrest plate moves obliquely upward and downward, and a block for restraining the handle in a moving position; the safety belt guiding assembly includes a latch disposed adjacent to the hinge position of the cushion and the backrest plate, so that the latch is driven to move upward and downward when the hinge position of the cushion and the backrest plate moves obliquely upward and downward.