Circuit board with high flexural strength

The utility model discloses a circuit board with high flexural strength, which belongs to the technical field of circuit boards, aims at solving the problem that the circuit board is easy to damage due to low flexural strength when the circuit board is used, and comprises a main line board, four positioning lugs which are distributed in a rectangular shape are integrally formed on the periphery of the main line board, the outer surfaces of the four positioning lugs are provided with a flexural frame in an attached manner; according to the utility model, the positioning lugs of the main wire board are embedded with the anti-deflection frame, the main wire board, the anti-deflection frame and the supporting base plate can form spiral fastening installation through spiral tightening treatment of the four positioning bolts, and the anti-deflection frame is supported and placed through the four positioning bolts. The heat exchange and heat dissipation effects of the main wire board through the cooling fins and the