The invention discloses a rotation type filling measuring pump for an easy-bending plastic bottle filling and sealing machine. The rotation type filling measuring pump comprises a filling pump piston rotating mechanism and a filling pump body lifting mechanism. The filling pump piston rotating mechanism comprises a main transmission shaft, transmission gears, vertical shafts, big stand columns, pinions, transmission blocks, piston connecting shafts, measuring pump pistons, positioning fixed plates and a countertop. The filling pump body lifting mechanism comprises a filling cam, servo bearings, a rotating arm, a middle shaft, air cylinder fixed bases, air cylinders, levers, knuckle bearings, lifting shafts, lifting bases and measuring pump bodies. Through interaction of vertical lifting motion of the measuring pump bodies and rotating motion of the measuring pump pistons, the filling function of liquid is achieved, and the situation that filling is not conducted without bottles is achieved, and liquid dropping in filling is avoided; the measuring size can be adjusted automatically and slightly, so that filling measuring is more precise.