The invention provides a construction method for controlling negative elevation of a concrete surface by adopting a convex type scraping rule. The construction method comprises the following steps: preparing a convex type scraping rule with a fixed size through cutting and machining aluminum alloy steel; setting a concrete road surface side mold according to designed road surface elevation; when pouring a concrete foundation, scrapping a construction concrete foundation pouring surface downwards by adopting a convex surface of the set scraping rule, and checking the flatness of a transverse road surface; downwards checking the flatness of a longitudinal road surface of the concrete foundation by adopting an upward plane of the convex surface of the set scraping rule; and after manually carrying out wood floating and polishing on the flattened foundation surface, carrying out the construction of a wear-resisting layer of the next step. The construction method can be used for rapidly and accurately controlling the negative elevation of the concrete foundation surface, and a construction space of the wear-resisting layer at the upper part of a concrete foundation is reserved, and two times of formwork erection before the construction of the wear-resisting layer are avoided, so that the construction cost can be effectively reduced and a construction progress is accelerated; the construction method is simple and reliable and the working efficiency can be effectively improved.