Although from the market point of view, most furniture products are centrally produced by large mechanized factories, in the past two years, private customization has slowly formed an irreversible trend in many places. On the one hand, it can prevent the rebound of materials, resulting in unsafe accidents. On the other hand, it can also prevent excessive heat generation caused by excessive friction. In fact, many manufacturers have their own innovations in this field. For users, they should know more about the information on the market and see what they pay most attention to. In this way, we can choose the really satisfactory machine and make our processing work more convenient. Even professionals can't take everything into account. In fact, in addition to the classification according to the price, there is a slightly more expert selection method, that is to look at the material of the circular saw's opening knife. Although this is not a 100% guarantee, it is a more reliable selection method.