The invention relates to a novel all-solid-state terahertz receiver front end comprising a radio-frequency E-plane waveguide power splitter, a local oscillator H-plane waveguide power splitter, an intermediate-frequency coupling loop, a direct-current bias unit, an intermediate-frequency signal and two terahertz fundamental-wave mixers. Schottky diodes in the two erahertz fundamental-wave mixers are distributed in opposite directions. A radio-frequency signal and a local oscillator drive signal enter the Schottky diodes by radio-frequency waveguide-microstrip transition and local oscillator waveguide-microstrip transition respectively to carry out mixing processing; all harmonic components generated by mixing are filtered by corresponding intermediate-frequency filters to obtain intermediate-frequency signals; the intermediate-frequency signals are outputted by corresponding intermediate-frequency filters and the outputted signals enter the intermediate-frequency coupling loop; and after 180-degree phase transformation, intermediate-frequency signals are outputted. According to the novel all-solid-state terahertz receiver front end, noises introduced by local oscillator signals in the all-solid-state terahertz receiver can be suppressed effectively, so that the noise coefficient and sensitivity of the system are improved and thus the overall performances of the system are enhanced.