The invention discloses a cross beam for a student bed. The cross beam comprises a main body, wherein a bed board is arranged at the lower end of the main body, an escalator is arranged on the outer surface of the front end of the bed board, a No.1 bedstead and a No.3 bedstead are arranged on the outer surface of one side of the bed board, the No.1 bedstead is located on one side of the No.3 bedstead, a No.2 bedstead and a No.4 bedstead are arranged on the outer surface of the other side of the bed board, the No.2 bedstead is located on one side of the No.4 bedstead, a cross beam main body isarranged on the outer surface of the upper end of the escalator, a side fence is arranged on the outer surface of one side of the cross beam main body, a No.1 connecting support rod is arranged between the No.3 bedstead and the No.4 bedstead, and a No.2 connecting rod is arranged between the No.1 bedstead and the No.2 bedstead. The cross beam for the student bed is provided with hooks, an illuminating device and fixing devices, so that a user can hang a mosquito net conveniently when the cross beam is used, an illuminating lamp can be fixed, stability of the device is facilitated, and better use prospects are achieved.