Why the tree wins every time it goes up
A decorated tree offers your cat almost everything she looks for in a climbing spot: height, branches that move under her paws, dangling objects that swing when touched, and a trunk that is easy to grip. It also appears suddenly in a familiar room, which makes it the most interesting novelty of the season. Shouting when she is already halfway up rarely works because the reward of climbing is immediate, while your reaction arrives after she has enjoyed it.
Treat the tree as an environment problem first and a training problem second. If the tree rocks when she leans on it, holds breakable ornaments at cat height, and stands alone as the tallest perch in the room, she will keep testing it no matter how often she is lifted down.
Make the tree itself unrewarding to climb
Put the tree in a heavy, wide base and anchor the trunk to the wall or a solid piece of furniture with discreet cord so it cannot tip or sway invitingly. Keep the lowest branches clear of dangling ornaments, and place anything fragile, edible, or strung on wire well above the height she can reach from furniture nearby. Tinsel and loose ribbon deserve special care because a cat who chews them can swallow strands that are dangerous for her gut.
For the first few days, surround the base with a surface she dislikes walking on, such as crinkled foil loosely laid over the tree skirt, and remove it once the novelty fades. A stable, plain lower tree gives her very little payoff for the effort of climbing.
Offer a perch that beats the tree
Place a tall cat tree, shelf, or sturdy scratching post close enough to the decorated tree that she can watch the lights and the room from a similar height without touching a branch. Reward her every time she chooses that perch instead, with a small treat, a play burst, or quiet praise delivered while she is on it, not after she has come down from the tree.
The perch also needs a good view of the people she was trying to survey from the tree. When the alternative gives her the same vantage point plus rewards, the tree loses much of its appeal.
Redirect calmly and protect the risky moments
When you see her crouching to jump at the branches, interrupt before she launches with a toy tossed away from the tree or a call to her perch, then reward the choice she makes instead. Lifting her down silently is fine, but turning the removal into a game or a chase teaches her that climbing summons attention and play.
Unsupervised time is when most tree incidents happen, so close the room off or use a barrier when nobody is around until she has ignored the tree reliably for several days. Check electrical cords for chewing each evening, keep water in the tree stand covered so she cannot drink from it, and sweep fallen needles that she might mouth. If she eats needles, chews cords repeatedly, or swallows any decoration material, contact your veterinarian promptly rather than waiting to see if it passes.
Keep the routine shared until the tree comes down
Consistency matters more than intensity: one person allowing a cute photo of her in the branches undoes a week of everyone else redirecting her. Agree who anchors and inspects the tree each morning, who refreshes the foil at the base, and who leads the evening play session that burns off her climbing energy. With KinsLe Care Teams you can assign those tree checks and play duties to each person in the house and see each task marked complete, so your cat hears the same answer from everyone.