A high-efficiency biomass treatment tar poly-generation pyrolysis furnace comprises a feed bunker (1), a lock bucket (2), a settling chamber (3), a reaction chamber, a cooling chamber and a discharged charcoal bunker (12), the lower end of the settling chamber (3) is connected with the reaction chamber, the lower end of the reaction chamber is connected with the cooling chamber, the bottom end of the cooling chamber is connected with the discharged charcoal bunker (12), a feed hose tube (22) is arranged in the settling chamber (3), the top end of the lock bucket (2) is connected with the outlet of the feed bunker (1), the bottom end of the lock bucket (2) is connected with the inlet of the feed hose tube (22) of the settling chamber (3), the inner wall of the settling chamber (3) is provided with a deflector separator (4), the deflector separator (4) is connected with the outer wall of the feed hose tube (23), and the top of the settling chamber (3) is provided with a pyrolysis gas outlet (15). The deflector separator (4) realizes gas-solid separation, so dusts in combustible gas are separated, the combustible gas is purified, and the coking rate of a purification system is reduced.