The utility model provides a DIN guide rail constructs with module base's fixed knot, includes: module base has the mounting groove on it, the bottom that the bottom of a cell wall of mounting groove was provided with joint portion, another cell wall is provided with spacing portion, with the DIN guide rail, install in the mounting groove, and one of which installation turn -ups cartridge in joint portion, another installation turn -ups fixes the DIN guide rail on module base with the cooperation of spacing portion, spacing portion and joint portion. The application provides a DIN guide rail constructs with module base's fixed knot, convenience, firm in connection, with low costs are dismantled in its installation, need not to every module installation guide rail buckle, and be firmly durable moreover.