The invention provides an assembly type bottom fast fixing structure for a light-transmitting glass cylinder. The assembly type bottom fast fixing structure comprises the light-transmitting glass cylinder, the bottom of the light-transmitting glass cylinder is fixedly connected to the ground through a fast connection part, and the fast connection part comprises a sleeve fixedly installed on the ground. A threaded face is machined on the inner wall of the sleeve, and an inner sleeve is connected to the threaded face in a screw manner. A ball body is fixedly connected to the inner sleeve, a clamping hook is fixedly connected to the side wall of the light-transmitting glass cylinder, and the end portion of the clamping hook is connected with the ball body in a clamping manner. Compared with the prior art, the assembly type bottom fast fixing structure can be used for effectively solving the problems that in an existing glass cylinder bottom connecting manner, demounting and mounting are not convenient, installation is not firm and the appearance is not attractive can be effectively solved.