The invention discloses an estimation method for a driver demand torque of a CVT parallel hybrid electric vehicle. The estimation method aims at the difference whether two power sources of the parallel hybrid electric vehicle under different modes work or not and is based on the combined outer characteristic of a modal-solution power system, a true maximum output characteristic of a system is obtained. Aiming at the characteristic that a CVT speed ratio step-less variation characteristic influences output, a CVT input rotating speed range is obtained through a vehicle speed and a speed ratio range ig; then an input rotating speed limit is obtained based on an optimized rotating speed range of a main power source under different modes; an input torque range is obtained through the combined outer characteristic of a limited input rotating speed interpolation; then an output torque range and a maximum output torque value of the system are obtained through the speed ratio; and finally a demand torque accurate value is obtained through an accelerator pedal. According to the estimation method for the driver demand torque of the CVT parallel hybrid electric vehicle, based on the combined outer characteristic of the modal-solution power system and an optimal work rotating speed range and through the CVT speed ratio step-less variation characteristic, the torque ranges and the true maximum output characteristic of the system are obtained through the rotating speed range, so that the demand torque can be accurately estimated, and the power performance and the driving experience are improved.