A child stroller apparatus includes a stroller frame and a stroller seat. The stroller seat includes a backrest portion fixedly connected with a first joining part, a seat portion fixedly connected with a second joining part that is pivotally connected with the first joining part, a coupling part pivotally connected with the second joining part at a side thereof opposite to that of the first joining part and adapted to connect with the stroller frame, a latch movable between a locking position engaged with the coupling part and an unlocking position disengaged from the coupling part, and a linking mechanism configured to movably couple the latch to the first joining part so that the backrest portion is rotatable in a folding direction to cause the latch to disengage from the coupling part and in an unfolding direction to cause the latch to engage with the coupling part.