The invention provides a 10kV overhead line combined limit insulation device and a use method thereof. The limit insulation device comprises a support shaped like a Chinese character "wang", an electric pole guide cylinder and an erection support mechanism. The support shaped like a Chinese character "wang" comprises three horizontal support bars and one longitudinal support bar. The three horizontal support bars are arranged on the longitudinal support bar through clamp rings respectively; and the two ends of each horizontal support bar are provided with two line clamping mechanisms respectively. Each line clamping mechanism comprises a support plate and line clampers. Each line clamper comprises an upper fixation clamping plate, a lower fixation clamping plate, an arc movable press plate, a limit plate and a first spring. The electric pole guide cylinder is arranged on the longitudinal support bar. The erection support mechanism comprises a vertical support bar, an erection adjustingrod, a connection clamping head and a pull rope. Fixed-distance isolation between upper and lower and left and right sides of phase lines can be realized effectively through the horizontal support bars and the longitudinal support bar in the device, thereby not only simplifying fixed-distance isolation operation flow of the phase lines, but also greatly reducing the number of cooperative workingpersons.