The utility model provides a novel all solid state terahertz front -end of receiver now, includes radio frequency E face waveguide power splitter, local oscillator H face waveguide power splitter, IFcoupling ring, DC bias, intermediate frequency signal and two terahertz zi jibo first detectors, wherein, and the schottky diode's in two terahertz zijibo first detectors the opposite direction that arranges, be radiofrequency signal and local oscillator drive signal respectively through the radio frequency plumbing microstrip transition, local oscillator waveguide the microstrip transition getsinto schottky diode and carries out the mixing processing, and each time harmonic component that the mixing produced is strained the back by corresponding IF filter, and the intermediate frequency signal who obtains via corresponding IF filter output, gets into the IF coupling and encircles respectively, after 180 phse conversions, and output intermediate frequency signal. The utility model discloses terahertz front -end of receiver now can effectively restrain the all solid state terahertz noise that the local oscillator signal was introduced in the receiver now, the noise coefficient and the sensitivity that improve the system, and then lift system's wholeness ability.