The invention discloses a novel 3D printer constant-temperature deodorizing device which structurally comprises a vent hole, a gas transmission pipe, a supporting column, a bottom plate, a constant-temperature exhaust fan, a printer, an exhaust pipe, a detachable glass baffle, a transmission plate, a cushion block and a printer protection shell. The vent hole and the detachable glass baffle are ofan integrated structure, the gas transmission pipe is connected to the printer protection shell in an embedded mode, the supporting column is perpendicular to the transmission plate, the exhaust pipeis connected to the printer in an embedded mode, the bottom plate is connected with the transmission plate through the cushion block, and the transmission plate is arranged inside the printer protection shell. According to the novel 3D printer constant-temperature deodorizing device, a metal outer frame is fixed to the printer protection shell through a fixer for sheltering from pigment splashedout during printing so as to achieve a protection effect, the metal outer frame can be detached after printing is finished to be cleaned, the cleanliness of the glass plate is ensured, and a rubber ring can prevent the glass plate from being damaged by wall collision.