Does anyone know if there is lockers at shanghai pudong airport for storing our luggage?

Yes, lockers are available at the airport. They can be found both at T1 and T2. The locations are as follows:
T1: between Gate 4 and 5, 10 and 11 in the Departure Hall; between Gate 6 and 7 of the greeting area in the Arrival Hall
T2: near Island A and M in the Departure Hall; near the International exit in the Arrival Hall