The following are some simple and cheap suggestions for the decoration design of fast food restaurants: 1. Simple decoration style: choosing simple decoration style, such as modern minimalist or industrial style, can reduce the decoration cost. Avoid using complicated decorations and ornaments, which will increase the cost. 2. Use cheap materials: Using cheap materials, such as PVC boards, wooden boards, gypsum boards, etc., can reduce the decoration cost. These materials are not only cheap, but also easy to install and maintain. 3. Simple lighting design: Choosing a simple lighting design, such as LED lights, can reduce energy consumption and maintenance costs. Avoid using too many lamps and lighting effects, which will increase the cost. 4. Simple furniture and decoration: Choosing simple furniture and decoration, such as simple tables and chairs and wall decoration, can reduce costs. Avoid using expensive furniture and decorations, which will increase the cost. 5. Do it yourself: If you have some DIY skills, you can do some decoration work yourself, such as painting and installing lamps, which can reduce the cost. However, if you don't have the relevant skills and experience, please don't try to finish these tasks yourself, so as not to cause security problems.