A river sand brick is disclosed. The river sand brick is characterized in that raw materials include 40-80% of river sand, 10-30% of quick lime, 5-15% of cement, 5-15% of fly ash, and a reinforcing agent the amount of which is 0.6-1.2% of the amount of the cement; and the brick is manufactured by adding water into the raw materials, fully stirring the mixture and pressing the mixture through a brick manufacturing machine. The raw materials adopted include the river sand and industrial waste slag, and does not include soil so that vegetation is not destroyed. No sintering is adopted in production, thus saving a large amount of fuel and avoiding air pollution. A high amount of various types of waste slag is utilized, thus achieving a positive protection function on the city environment. Theproduction period is short, and the brick is low in cost and high in strength.