The invention discloses a single-sided circuit board capable of being spliced for use. Comprising a single-sided circuit board body, a first connecting rod, a first limiting seat, a second connecting rod, a first moving block, a first clamping seat, a first clamping block, a second clamping block, a plugging terminal, a first fastening bolt, a limiting disc, a mounting frame, a swinging rod, a rotating block, a stud, a moving plate, a third clamping block, a first clamping groove, a limiting plate, a second fastening bolt, a heat conducting sheet, a second clamping groove and a second limiting seat. According to the device, a first clamping block and a second clamping block are correspondingly connected with a first clamping groove and a second clamping groove, so that the device is spliced, the splicing time of the device is shortened, and the splicing efficiency of the device is improved. The second limiting seat is moved so that the second limiting seat can be connected with the fixing seat at the position needing to be fixed in a matched mode, and therefore the single-face circuit board body is fixed, and the installation efficiency of fixing the single-face circuit board body is improved.