We　explicitly　model　entanglement　in　quantum　processes　by　treating　entanglement　as　a　kind　of　parallelism.　We　introduce　a　shadow　constant　quantum　operation　and　a　so-called　entanglement　merge　into　quantum　process　algebra　qACP.　The　transition　rules　of　the　shadow　constant　quantum　operation　and　entanglement　merge　are　designed.　We　also　do　a　sound　and　complete　axiomatization　modulo　the　so-called　quantum　bisimilarity　for　the　shadow　constant　quantum　operation　and　entanglement　merge.　Then,　this　new　type　entanglement　merge　is　extended　into　the　full　qACP.　The　new　qACP　has　wide　use　in　verification　for　quantum　protocols,　since　most　quantum　protocols　have　mixtures　with　classical　and　quantum　information,　and　also　there　are　many　quantum　protocols　adopting　entanglement.