This paper combs the design specifications of mainstream applet platforms and three practical skills that applet Logo design needs to master. The logo of applet is usually displayed on the screen of mobile phone, which requires high recognition of logo design. It is necessary to ensure that the logo can achieve beautiful and clear presentation effect in applet. This paper combs the design specifications of the mainstream applet platform and three practical skills of applet logo design, hoping to help friends who need to design applet logo. The logo design of small programs regulates the three platforms, namely WeChat, Alipay and Baidu, which are similar. I have compiled the following table. Among them, the WeChat applet logo supports uploading gif format, but it cannot be greater than 2m; The most recommended is to use png image format to keep the best effect. Small program logo design skills 1: To reserve a suitable blank small program logo design, both square and round display scenes need to be taken into account, so the main graphic cannot be cut by the front round container or round square. Take the general small program logo size 144* 144px as an example. The recommended size of the logo main graphic is 144*72%. The main graphic needs to be within this circular range. If the figure is special, it can be increased or decreased according to visual perception to ensure proper visual balance. * Show the case through the online design applet of logo artifact. logo design skill 2: Simplify the number of colors. The applet itself is positioned as a lightweight tool, so the LOGO design is as simple and fashionable as possible to avoid complicated colors and graphics interfering with the user's sight. If the logo itself is complicated or has too many colors, it is recommended to adopt a graphic/text design with a colored background and white highlights. Compared with the white background, the colored background is more integrated visually, highlights the main part of the logo and is more attractive. * Show the case logo design skill 3 through the online design applet of logo artifact: If you can't find a suitable graphic design logo by using graphic characters, it is also a method to directly use plain text LOGO. The advantage of text logo is that it is easier to identify than graphic logo. For example, idle fish, one finger, Zhihu, boss and other small programs directly employed all use graphic characters as logo. It should be noted that the number of characters to be controlled should generally not exceed two. You can combine the design method of extracting brand initials and English letters logo that we introduced earlier to design graphic text logo. * Show the cases recommended by the online design applet LOGO design generation tool of LOGO artifact. If you are a novice designer, you can generate a variety of logo design schemes by entering the name through the logo artifact. And in the Logo download center, you can directly download the logo icon suitable for the applet platform specification, helping the applet R&D team to quickly complete the logo design.