The invention discloses a seamless wireless type plate shape gauge of an entire roller, which is characterized in that a plate shape gauge detecting roller (2) detects an original plate shape signal which is transmitted to a signal processing circuit board (31) in a power self-generating signal processing and wireless emitting device (4) through a coaxial high shielded cable; and after being processed by a DSP chip, a coded digital signal packet is output by a wireless emitter (36) in the power self-generating signal processing and wireless emitting device (4) in a wireless way. After the wireless receiver (5) receives the data packet, a decoder (6) restores the received data packet and delivers the data packet a software processing system (7) for carrying out digital filtration, signal compensation, and the like on the plate shape signal so as to obtain real online plate shape data. The invention avoids scratching the surface of a band steel; a differential charge amplifier is adopted so that the plate shape gauge has fine high frequency and low frequency response characteristics; all circuits are completely sealed inside a roller body, the data packet of the plate shape signal is emitted in real time through antennae and the plate shape gauge has excellent shielding property, realizes wireless emitting and receiving of the signal, avoids slip ring type wired transmission, effectively eliminates the influence of interference factors on plate shape detecting signals and accurately detects the signal in real time so that the plate shape gauge can stably run for a long time under the a serious working condition.