The utility model provides a PVDF (Polyvinylidene Fluoride) ultrasonic array sensor. The PVDF ultrasonic array sensor comprises a sensor shell and a plurality of ultrasonic array elements arranged inthe sensor shell, each ultrasonic array element comprises an array element shell, an acoustic matching layer, a PVDF piezoelectric material, a sound absorption backing and a wire. The acoustic matching layer is mounted at the first end part of the array element shell and fills the first opening to enable the first end part to form a closed end; the PVDF piezoelectric material is filled between thesound matching layer and the sound absorption backing, and is groove-shaped; the PVDF piezoelectric material converts received ultrasonic signals into electric signals, the electric signals are transmitted to the data collector through the wire, and the data collector sends the received electric signals to the processing unit. According to the utility model, the sensitivity and the anti-interference capability of array signal receiving can be effectively improved.