The methods to improve the sliding angle of cartons are: stacking and using partitions.

1. Stacking mode: The correct stacking mode will affect the sliding angle of cartons. Try to ensure that the bottom of each carton can fully contact the top of the carton below to improve stability. In addition, the "staggered stacking method" can also be adopted, that is, the bottom of each carton layer is staggered from the top of the carton above, which can increase stability.

2. Use partitions: When cartons are stacked, partitions or fillers, such as wooden boards and plastic boards, can be used to increase the friction between cartons and improve the sliding angle.