School Food Modernization Act

School Food Modernization Act - Amends the Richard B. Russell National School Lunch Act to direct the Secretary of Agriculture (USDA) to issue loan guarantees to local educational agencies (LEAs) or school food authorities administering or operating a school lunch program, tribal organizations, or consortia of such entities to finance the construction, remodeling, or expansion of infrastructure or the purchase of durable equipment that will facilitate their provision of healthy meals through the school lunch program.

Requires the Secretary to give a preference to applicants that demonstrate a substantial or disproportionate need for food service infrastructure or durable equipment. Prohibits a loan guarantee from covering more than 80% of a loan's principal.

Requires the Secretary to establish fees for the loan guarantee program that: (1) are sufficient to cover the federal government's administrative costs in operating the program, and (2) may be based on the risk premium associated with the particular loan or loan guarantee.

Directs the Secretary to award competitive matching grants to assist LEAs or school food authorities administering or operating a school lunch program, tribal organizations, or consortia of such entities in purchasing the durable equipment and infrastructure they need to serve healthier meals and improve food safety.

Requires the Secretary to give grant priority to applicants that: (1) have identified and are reasonably expected to meet an unmet local or community need, and (2) are located in states that have enacted funding measures to assist them with such purchases.

Prohibits such a grant from covering more than 80% of the total cost of the durable equipment and infrastructure.

Directs the Secretary to award competitive matching grants to experienced third-party training institutions to provide school food service personnel with the training and technical assistance they need to meet updated school lunch program nutrition standards.

Prohibits such a grant from covering more than 80% of the total cost of the training and technical assistance.