Abstract: The present invention is a low-cost tile installation surface level gauge. The tile installation surface level gauge aims to fill the gap in existing tile flooring tools. The tile installation surface level gauge is used in putting all installed tiles on the same level accurately without repeated and time consuming adjustment. The tile installation surface level gauge includes a disk, a reeling thread, a base, and a thread reel tackle. One end of the reeling thread is attached to the middle of the disk. The thread reel tackle is installed onto the base. The process of using the tile surface level gauge is as follows: 1) once one tile is installed, slide the disk under one of the corners of the installed tile and leave the reeling thread uncovered. The installed tile covers about a quarter of the disk. 2) Install a second tile covering about a quarter of the disk and leave the reeling thread uncovered. The second tile shall align with the first installed tile.