1. Precisely control filling amount through control of piston stroke of the cylinder with a fixed volume. 2. It is suitable for ointment filling and can be equipped with bunker with heating and heat insulation functions (optional) 3. It can choose single head or multi-head combination as per capacity to realize single head or multi-head filling line. 4. Filling is disabled for lacking of bottles and fallen bottles; filling leaves no drop; high filling precision; 5. Easy and convenient operation; reliable performance and safety linkage. Applicable scope: it is suitable for filling of viscous solutions in industries like pharmaceutical, food, chemical industry, cosmetics and agriculture.