Improved proprelling pencil

The utility model relates to an improved propelling pencil, which mainly comprises a shaft barrel, a pencil point sleeve, a connecting barrel and a conduit, wherein, the shaft barrel and the connecting barrel are mutually in screw connection, and the disassembly and the displacement of a pencil core are fast and convenient. The pencil point sleeve is covered on the front end of the connecting barrel, the inside of the pen point sleeve is provided with a clamping mechanism which only can make the pencil core to move forward and a sliding mechanism which can withdraw the pencil core, the clamping mechanism is provided with a clamping hole which is provided with a pencil core hole, and the conduit penetrates through a through hole of the connecting barrel and is butted to the clamping hole. A guiding hole of the conduit is mutually communicated with the pencil core hole, the inner diameters of the guiding hole and the pencil core hole are same as the outer diameter of the pencil core, and the utility model can avoid the jam which is caused by the superposition of pencil cores and can increase the service life.