The present invention relates to a towed-type road snow-scraping sweeper which can be towed by tractor. It includes a machine frame, and it is characterized by that on said machine frame an external cover device, a power transmission device, a snow-scraping wheel shaft device, a snow-scraping sweeping device and a supporting device are mounted, in which the snow-scraping wheel shaft device includes left and right snow-scraping wheel shafts with snow-scraping chain wheels, and the snow-scraping sweeping device includes front and rear snow-scraping chains, several snow-scraping angle-irons and snow-scraping plates. Besides, said invention also provides its working principle and concrete operation method. |