Rigid-flex flat press fit PCB (printed circuit board)

The utility model discloses a rigid-flex flat laminated PCB (printed circuit board), which comprises a flexible core board, a first copper foil layer, a first flowing prepreg layer, a second copper foil layer and a second flowing prepreg layer. The first flowing prepreg layer is provided with a plurality of first filling parts which are respectively filled in the plurality of upper grooves in a one-to-one correspondence manner; an underneath rigid core plate unit is arranged between the second flowing prepreg layer and the flexible core plate, a plurality of underneath grooves are formed in the underneath rigid core plate unit, and the second flowing prepreg layer is provided with a plurality of second filling parts which are filled in the underneath grooves in a one-to-one correspondence mode. According to the utility model, the plurality of first filling parts of the first flowing prepreg layer are respectively filled in the plurality of upper grooves of the upper rigid core board unit in a one-to-one corre