The invention discloses a high-resistance broadband attenuation circuit and also discloses a digital oscilloscope using the high-resistance broadband attenuation circuit. The high-resistance broadband attenuation circuit comprises a first relay, a second relay, a high-frequency compensation circuit, a first RC (Remote Control) network and a second RC network. The moving contact of the first relay is connected with an input end, the moving contact of the second relay is connected with an output end, and the control ends of the first relay and the second relay are connected together; the second static contact of the first relay is connected with the high-frequency compensation circuit and the first RC network, the other end of the high-frequency compensation circuit is grounded, and the other end of the first RC network is connected with the second RC network; and one end of the second RC network is grounded, and the other end of the second RC network is connected with the second static contact of the second relay through a resistor. The influence of equivalent series inductance at a high frequency on the high-resistance broadband attenuation circuit is quite small; a high-frequency signal component has sufficient release for the ground; and the bandwidth of an output signal is large, the signal overshoot is small, and the frequency response is good.