Smart card PCB assembly and set-top box having the same

A PCB component of intelligent cards comprises an intelligent card PCB having gaps at both sides and also comprises a fixing device that extends with stoppers from two lateral sides at the direction of the slot of an intelligent card, forming an interspace between the stopper and the lateral side, and each lateral side of the fixing device forms a step near the bottom. The bottom of the fixing device extends with bossed parts at both sides, and the bossed parts are provided with buckles, and the buckles are inserted at the gaps of the intelligent card PCB, and the buckles button up the intelligent card PCB. The utility model also discloses a set top box of the PCB component of intelligent cards. Compared with prior arts, the PCB component takes buckling and inserting structure, which avoids fixing with screws and has the effect that is not only firm and stable, but also convenient for disassembly and lower in cost.