Biomass pulverizing device and combustion system

The utility model relates to a biomass pulverizing device and a combustion system, and belongs to the technical field of biomass combustion, the biomass pulverizing device comprises a biomass pulverizer, a packaging shell and a circulating fan, and a screen is installed at an outlet of the biomass pulverizer and used for pulverizing biomass raw materials; the packaging shell is mounted on the outer side of the biomass crusher and is used for covering the biomass crusher; the packaging shell is provided with a feeding port communicating with an inlet of the biomass pulverizer and a discharging port communicating with an outlet of the biomass pulverizer. An air outlet of the circulating fan communicates with the interior of the packaging shell, and an air inlet of the circulating fan communicates with a tail flue of a combustion furnace used for biomass combustion. The opposite side of the packaging shell communicates with a hearth of the combustion furnace. The opposite side of the packaging shell refers to th