The invention provides a high-speed rail unballasted double-track pavement multifunctional intelligent vehicle, and relates to the technical field of high-speed rail underground railway track pavement gauge positioning, spike screwing and stepping automation. A system comprises four elastic strip buckle automatic push-in-place device, an intelligent vehicle automatic stepping device, a standard gauge positioning, rectifying and locking device, an intelligent vehicle up and down rail device, a measuring, analyzing, recording and networking device and an intelligent vehicle central processing and decision making module. Spot testing is conducted on tightening torque of current high-speed rail system rail buckle elastic strip spike nut, data is not recorded in, artificial cutting is conducted by various work types, detaching and assembling are repeated multiple times, bolts, nuts and threads are damaged, and driving safety is influenced; due to artificial cutting, the construction period is prolonged, the construction site is disordered, and the multifunctional intelligent vehicle is created. The technical problem that in pavement, the multiple procedures of screwing, detaching and gauge detecting are combined is solved, the rail pavement engineering quality is ensured, production efficiency is improved, the engineering construction period is shortened, and the labor intensity of operators is relieved.