Filtering magnetic core structure, filter, motor controller and vehicle

The utility model relates to a filtering magnetic core structure, a filter, a motor controller and a vehicle, the filtering magnetic core structure comprises a connection busbar, the connection busbar comprises a first conductor piece, a second conductor piece and an insulation structure, the insulation structure comprises insulation layers wrapping the first conductor piece and the second conductor piece respectively and a shell arranged in the circumferential direction of a part of the insulation layers in a sleeving mode, an accommodating cavity with an opening is formed between the shell and the insulating layer; and the filtering magnetic core is encapsulated in the accommodating cavity through pouring sealant and is sleeved on the first conductor piece and the second conductor piece. The filtering magnetic core structure is encapsulated in the accommodating cavity formed by the shell and the insulating layer through the pouring sealant, and is not in direct contact with the surrounding shell, so that th