The invention discloses an injection mold of a coffee maker material box. The injection mold comprises an upper panel, a board A, a lower mold core, a board B, square iron, an ejector pin panel, an ejector pin bottom board, a lower panel and an oil cylinder. The upper panel and the board A are connected through bolts. The board B, the square iron and the lower panel are connected through bolts. The two pieces of square iron are arranged. The ejector pin panel and the ejector pin bottom board are installed between the two pieces of square iron. The lower mold core is installed at the upper endof the board B. The lower mold core and the board B are connected through bolts. A first sliding block, a second sliding block, a third sliding block, a fourth sliding block and a fifth sliding blockare arranged at the upper end of the board B. A coffee maker material box injection molding cavity is formed among the first sliding block, the second sliding block, the third sliding block, the fourth sliding block, the fifth sliding block, the lower mold core and the board A, and through injection molding, the coffee maker material box is even in overall thickness, smooth in surface, good in quality and unlikely to deform, and competitiveness is improved.