The invention relates to a polyvinylidene fluoride (PVDF) ultrasonic transmitter with a double-cylinder structure, and belongs to the field of ultrasonic transmitters. Two strip-shaped piezoelectric films are placed in two grooves perpendicularly intersecting on a plastic spherical substrate, and are fixedly connected with the plastic spherical substrate by gluing to form a double-cylinder shape.The PVDF ultrasonic transmitter with the double-cylinder structure has the advantages that the structure is novel, the two identical strip-shaped PVDF piezoelectric films are enclosed in the two vertically intersecting grooves of the spherical substrate, fixing is carried out by the gluing, the PVDF ultrasonic transmitter with the double-cylinder structure is constituted, a spherical structure isformed, omnidirectional transmitting of ultrasonic waves is realized, the complexity of ultrasonic transmitting equipment is reduced, the cost is reduced, the miniaturization of the ultrasonic transmitting equipment is realized, the bandwidth of the transmitted ultrasonic waves is wide, and omnidirectional coverage of the beam angle is realized; and moreover, the surface area is relatively large,coupling with air is good, the wave impedance is low, and the PVDF ultrasonic transmitter with the double-cylinder structure is suitable for application fields such as aerial three-dimensional ultrasonic positioning, ranging, and robot obstacle avoidance.