The utility model discloses an ink horn of photo developing and printing machine convenient to clearance, including ink horn main part, notes china ink mouth and base, the upper end of ink horn main part is provided with the blow vent, and the inside of blow vent runs through and have the inner tube, the internally mounted of inner tube has air filter, and air filter's below settles and to have apiece, the upper end of inner tube is provided with the bolt head, the left side of annotating the china ink mouth is provided with the blow vent, the inside arrangement of ink horn main part has thebig basin -like inkstone of storage continuous, and stores up the continuous below of big basin -like inkstone and be provided with the filter screen, settle the below of filter screen has the showernozzle, and the right side of shower nozzle installs the support, the upper end of support is fixed with the slider, the top of base is provided with shower nozzle and support. This ink horn of photodeveloping and printing machine convenient to clearance is provided with the inner tube, rotates dismantling the inner tube that the inner tube can be convenient through the bolt head, can be convenient for more like this dismantle the clearance to the air filter in the inner tube, and the circumstances of having avoided air filter to stop up takes place.