The invention discloses an MCU (Microprogrammed Control Unit) numerical control fire extinguishing bomb. The MCU numerical control fire extinguishing bomb comprises a shell, a fire extinguishing agent, a detonating device and an MCU numerical control device, wherein a cavity formed by the shell is filled with the fire extinguishing agent, the MCU numerical control device comprises a control panel positioned outside and a single chip microcomputer positioned inside, and the detonating device is connected to the output end of the single chip microcomputer. The MCU numerical control device further comprises a storage, keys, a display, a temperature sensing device and a timer, wherein the storage is connected with the single chip microcomputer and is used for storing preset detonating modes, detonating temperature and detonating time. A fire extinguishing agent injection hole is formed in the top of the shell, and the MCU numerical control device is preferably installed in a threaded pipe and is removably installed at the bottom of the shell through the threaded pipe. According to the fire extinguishing bomb disclosed by the invention, the single chip microcomputer is used as a control device, two detonating modes including high-temperature detonation and delayed detonation are combined, and the fire extinguishing agent and the detonating device can be separately stored, so that the flexibility and safety of the fire extinguishing bomb are greatly increased.