The utility model provides a downhole general computer for a coal mine, which is applicable to the underground work environment with explosive mixtures in the coal mine. The downhole general computer mainly comprises a host computer, a monitor, a keyboard and an interface circuit board, wherein the host computer comprises a core board, a communication board, a power board and an interface circuit. Provided with the intrinsic safety-type input interface and the intrinsic safety-type network interface, the downhole general computer has the advantages of compact and durable structure, wide working temperature range, low power consumption, low heating value, strong versatility, high operating speed, high reliability, relative-low price and good use effect; and can meet the requirement for the application in various severe conditions.