Refer this post: https://www.odoo.com/forum/help-1/question/can-we-create-a-kunban-view-for-a-custom-module-17393

And don't forget to add kanban view mode in your window action.

<record id="action_partner_form" model="ir.actions.act_window">
    <field name="name">Customers</field>
    <field name="type">ir.actions.act_window</field>
    <field name="res_model">res.partner</field>
    <field name="view_type">form</field>
    <field name="view_mode">kanban,tree,form</field>
    <field name="context">{"search_default_customer":1}</field>
    <field name="search_view_id" ref="view_res_partner_filter"/>
    <field name="help" type="html">
      <p class="oe_view_nocontent_create">
        Click to add a contact in your address book.
      </p><p>
        Odoo helps you easily track all activities related to
        a customer: discussions, history of business opportunities,
        documents, etc.
      </p>
    </field>
</record>