Automatic brake mechanism, baby stroller and brake method of baby stroller

The invention relates to the technical field of baby strollers, in particular to an automatic brake mechanism, a baby stroller and a brake method of the baby stroller. The automatic brake mechanism comprises a motor, a brake bolt and a rotary shaft, wherein the motor and the brake blot are connected sequentially, and the brake bolt is separated from or connected with a wheel under the driving effect of the motor; and the a spiral guide groove is formed in the rotary shaft, the brake bolt comprises a driving piece and a brake piece which are connected with each other, brake holes matched with the brake piece in shape are formed in the wheel, the power output end of the motor is connected with the rotary shaft, and the driving piece is located in the spiral guide groove and slides in the spiral guide groove. According to the automatic brake mechanism and the baby stroller comprising same, under the condition that the whole structure of the baby stroller is not damaged, further improving is conducted on the stru