In order to further optimize the shunt circuit design of piezoelectric metamaterials, an active control circuit based on zero and pole assignment was proposed and the general rules of the zero and pole assignment were summarized. The related transfer functions were designed directly by adjusting the zeroes and poles, and realized by using the microcontroller. Because the digital controller can be remotely controlled by a computer, the band gap of metamaterials can be adjusted flexibly. This method reduces the complexity of the analog circuit, gets rid of the limitation that the parameters of the analog circuit needs to be manually adjusted, provides a new idea for the intelligent control of metamaterials, and is more convenient for practical applications. The experimental results show that the attenuation of piezoelectric metamaterials exceeds 14 dB in the low frequency mode range, which proves the effectiveness of the active control circuit used in the structure.