Dust filter

The invention discloses a dust filter comprising a carried-about box body and a breathing mask. A belt clip is arranged on one side of the carried-about box body, the lower half portion of the carried-about box body is provided with a filtering water tank, and the upper half portion of the carried-about box body is provided with an air tank. A breathing pipe is arranged on the air tank, and the breathing pipe and the air tank are connected in an inserting joint mode. An air inflow pipe and an air outflow pipe are further arranged on the carried-about box body, one end of the air inflow pipe is exposed out of the air tank, and the other end of the air inflow pipe penetrates through the air tank till the air inflow pipe enters the filtering water tank. A one-way valve is arranged on the air outflow pipe, and the air tank communicates with the filtering water tank through the air outflow pipe. A water inflow valve is arranged on the upper portion of the filtering water tank, a water outflow valve is arranged on