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In the present paper, we investigate the required anisotropy of an exactregular Bardeen black hole characterized by its mass $M$, the nonlinearparameter $g$, the quintessence field parameter $a$ in anti-de sitter spacetimewith a static quintessence matter field. We also show that the relativepressure anisotropy, equation of state and the pressure depends on radialcoordinate, reflecting the required anisotropy for Bardeen black hole in thequintessence background.  Next, we analyze the Joule-Thompson ($JT$) expansion of the black holespacetime. Treating the cosmological constant as thermodynamic pressure $P$ andits conjugate quantity as thermodynamic volume $V$ we derive the equation ofstate connecting Hawking temperature and various black hole parameters. Westudy the $JT$ expansion in the regular Bardeen AdS black holes in thequintessence background through the analysis of inversion temperature andisenthalpic curves. We derive the $JT$ coefficient $\mu$, and use them to plotthe inversion and isenthalpic curves. We discuss the effect of quintessenceparameter $a$ and $\omega_q$ on the $JT$ coefficient and inversion temperature,especially with the case of $\omega_q=-1$ and $\omega_q=-\frac{1}{3}$. Ouranalysis shows that quintessence dark energy affects the inversion point$(T_i,P_i)$ .

Joule-Thomson Expansion of Regular Bardeen AdS Black Hole Surrounded by Static Anisotropic Quintessence Field