Soluble fracturing pepper balls are divided into soluble plastic fracturing pepper balls and soluble metal fracturing pepper balls by materials. The materials of the two are completely different, and the application occasions are also different. Of course, the dissolution speed in fracturing is also different. Generally speaking, the dissolution speed of soluble plastic fracturing pepper balls is faster than that of soluble metal fracturing pepper balls.There are many kinds of materials for plastic fracturing pepper balls, among which PLA is the main material for soluble fracturing pepper balls. Due to technical reasons, PLA plastic fracturing pepper balls can't produce fracturing pepper balls with a diameter of more than 25mm, and the surface of plastic pepper balls with a diameter of more than 25mm will shrink seriously, resulting in small holes on the surface of plastic pepper balls and reduced strength, so the specifications of soluble plastic fracturing pepper balls are limited in size.Metal fracturing pepper balls are mainly made of metal aluminum and then added with a certain proportion of other metal elements, such as rare earths such as metal magnesium, metal gallium and metal tin. The purpose is to increase the activity of the surface of metal aluminum and avoid the appearance of oxide film, so that metal aluminum can fully react with fracturing fluid, thus achieving the purpose of dissolving metal fracturing pepper balls.