本发明涉及一种具有变色功能聚氨酯薄膜的制备方法，其具体步骤为：一、具有变色功能聚氨酯粘胶剂的制备：二、具有变色功能聚氨酯薄膜的制备：在0.1～3毫米的透明PET薄膜上下表面均匀的涂布上具有变色功能聚氨酯粘结剂，随后滚压离型膜，即制备一种具有变色功能聚氨酯薄膜。本申请具有变色功能。

The invention relates to a preparation method of a polyurethane film with a color change function. The method comprises the following specific steps: 1, preparing a polyurethane adhesive with the color change function; 2, preparing a polyurethane film with the color change function; 3, uniformly applying the polyurethane adhesive with the color change function to upper and lower surfaces of a transparent 0.1-3mm PET film, and rolling a release film to prepare the polyurethane film with the color change function. The polyurethane film has the color change function.